Consider planting Mexican sunflower as a colorful addition to the water-wise garden area. Petals do inevitably fade eventually when it gets towards the end of its life, but you should normally get a few good weeks of it in its prime. A field of sunflowers (Helianthus annuus) blowing in a summer breeze can evoke a romantic road trip through the south of France or an idyllic impressionist painting. Add three teaspoons of sugar to the lukewarm water in your vase, and place the wilted flower in and let it sit. How long to germinate sunflower seeds 5 reasons to grow sunflowers the what to do about drooping sunflowers in sunflowers how to plant grow and how much water do sunflowers need quora how to grow a sunflower in pot 12. Don’t let the soil dry out to a cracking stage either, keep the soil moist. What Types of Environments Do Sunflowers Grow In? shesaidsunflower.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. But of course, we want to ensure we get our sunflower to her maximum potential (well usually!). However, where the growing season is short, sunflowers can be safely planted up to 2 weeks before the last expected spring frost. On the plant spectrum, sunflowers are pretty thirsty creatures. Happy watering! Here’s a quick summary guide for you of the above so you can refer back to it if you need to. For more information, check out my article on over fertilizing plants. Wild sunflowers are self-sufficient and don't need intervention to get enough sun and water. Over-watering is more likely to harm them than under-watering. When growing sunflowers you do not need to concern yourself with fertilizing since the sunflower is quite capable of taking care of itself. Recut the stem at an angle, this will be a fresh area for water to be drawn up. With a few simple steps to follow you’ll soon give your sunflower the best start toward a glorious end! Required fields are marked *. In general, as long as you water deeply once a week and make sure that the plants get at least an inch of water a week, the plant will do well. Slugs and snails can be warded off with repellants. Giving your sunflowers the right amount of water is vital. If in doubt, or something doesn’t seem right, then refer to my complete Guide to remedy the situation or to get further guidance. This should ideally begin early in the morning before the sun has really started to directly hit them. These tips should add anywhere from 24 to 72 hours to the life of your bouquet.1. Comment document.getElementById("comment").setAttribute( "id", "a9a3f9dc5efc8d4f2b80eeeed187c53c" );document.getElementById("f92d6abd9d").setAttribute( "id", "comment" ); The girl behind shesaidsunflower.com. Usually it’s the smaller dwarf varieties of sunflowers that are grown in pots. To prevent seeds from washing to the surface when you water them, outfit your hose with a misting attachment or use a watering can with a fine spray head. Reduce watering for mature sunflowers. Water seedlings every couple of days or more often if conditions are especially hot and dry. I watch my sunflowers all the time whilst they’re growing, I do my best to take great care of them when they’re young. Do You Have to Replant Sunflowers Every Year? This will encourage good root growth and a large, heathy bloom. | Copyright© 2018-2019 shesaidsunflower.com. This helps to keep the head moist, helps wash away gathering dust particles and ensure all areas of the plant gets some direct water. Sunflowers need full sun, which means at least six hours of unfiltered sunlight every day. Generally, watering deeply once a week and providing at least 1 inch of water or enough to keep the soil moist to a 6-inch depth is sufficient if there isn't comparable rainfall in the preceding seven days. Keywords: too … Give it a good douse with water, then slowly increase the water quantity gradually to bring it back to life. They need to be, as one of the few flowers that can grow up to 15 feet (4.5m) or higher. More in their early stages of growth. I hope it helps as a quick reference tool. Use a tall vase to prevent wilting near the sunflower head and fill with water. How much water should you put in a vase only really matters if you’re concerned about getting the most out of your flowers. In the seedling stage, the potted sunflower can keep the soil moist and supply enough water. Try this with just one bloom or the whole bouquet, and as the flowers rest in the water, they should drink it up through their newly-snipped stems.5. Do Sunflowers Need A Lot Of Water When And How To ThemHow To Grow A Sunflower In Pot 12 Steps With PicturesDo Sunflowers Need A Lot Of Water When And How To ThemDo Sunflowers … Apply a good amount of water till it pools, until the sunflower is around 2 feet (61cm) tall then you should consider ensuring it has daily water. If you want to get it completely right, then see my complete guide to growing your sunflower! Even though sunflowers are drought resistant, they will grow much better if you give them water regularly, especially after the flowers develop. The reason for plants affected by too much water is that plants need to breathe. Sunflowers do not need much water. Due to their rapid growth, they need a minimum of 2 gallons, (7.57 Litres) a week. She has taken college courses in landscape design and permaculture, and is an avid gardener. This will add support on the bottom of the stem and help the top of the stem remain stiff. Pests and diseases. Having a relatively short season means they have a rapid growth rate and this can only be fueled by plenty of water and as much sunlight as possible. Best offers for your Garden - https://amzn.to/2InnD0w How Much Water Do Sunflower Plants Need?. Sunflowers aren’t picky but the soil can’t be too compact. Most sunflowers are fairly drought-tolerant once established, but will bloom better with regular water. To keep the sunflowers fresh remove any leaves that will be submerged in water and cut the stems at an angle. Don't allow the soil to dry out completely in the 20 days before and after flowering, if you are growing sunflowers for seeds. Sunflowers have a deep root system, they need it in order to support a large head and tall, heavy stem during potentially windy conditions – or to even hold the weight of a squirrel hanging off it! You will need sunflower seeds, water, dirt and fertilizer. Again good drainage is important. At this stage you want the seeds to dry out. They’re not too fussy when it comes to soil pH either. Too much water can be a problem sometimes, sunflowers are quite drought tolerant so don’t mind if they dry out for a few days. Source(s): I lived in a hot dry area where sunflowers grew wild. This site is owned and operated by Pam Anne and Michael Chamberlain. If you decide to take the challenge, expect a lower yield of blooms. The ideal time to water is in the morning, as root rot can set in over cold nights. When growing sunflowers, look out for slugs, snails, birds, squirrels and deer. Sunflowers (Helianthus annuus) grow as annuals, with some varieties only living for two months. “Sunflowers like daily routines! Planting sunflowers from seeds is the best way to encourage a healthy root system that ensures that your specimens get enough water for the entire growing season. How Much Water Do Sunflowers Need? If this occurs, gently aerate the soil with drainage holes, Do not soak the wider ground so much that it becomes unstable for the roots. Avoid adding any too close to the plant’s base. Do not water your sunflower if the ground still appears to be moist from the previous watering, Do not water shortly after it has rained sufficiently. If it forecasts rain, then see if that happens first. Sunflowers thrive in slightly acidic to somewhat alkaline soil (pH 6.0 to 7.5). To keep it from drying out, the annual requires ample water, at least around the time of flowering. But how much sun and water do you need to grow sunflowers in your own garden? Water in time during the growing period, but do not water too much at one time. Cut through the stem of the selected flowers with the shears. As long as there is a sufficient amount of rainwater outside – which is usually a good downpour around 3 times a week, then sunflowers will grow fine. This will also protect them in high winds or in the rain. Ensure the soil has good drainage as sunflowers do not grow to their full potential in soil that retains the water. Sunflowers come in many varieties, some of which are hardy as far north as U. S. Department of Agriculture plant hardiness zone 3. As your plant grows, be sure to provide fertilizer if needed – sunflowers are heavy feeders. Sunflowers that branch and feature several blooms on single stems will require more horizontal space and large varieties that grow single flowers. As its name implies, the common sunflower (Helianthus annuus) loves sun. They breathe through their roots and when there is too much water, the roots cannot take in gases. Here’s what you need to know about vase water best practice for your Bouq: And whilst watering around the base is important, keep a spray bottle handy and spray a few times over the head of the sunflower too. Garden netting can protect newly planted seeds from being poached by hungry birds or other pests. Having watered them too much and too little over the years, I felt it was important to provide the best advice possible for watering your sunflower.eval(ez_write_tag([[728,90],'shesaidsunflower_com-medrectangle-3','ezslot_7',134,'0','0'])); Do Sunflowers Need a Lot of Water? This will give the sunflowers time to soak up as much water as possible, so when you pick them they will be at their optimal freshness. Sunflowers (Helianthus annuus) likes to live in well-drained soil, so that it has access to water, but not too much. Keep the soil around newly planted seeds evenly moist. If it's turning yellow, it's probably getting too much water. Immediately placing cut sunflowers in water helps prevent later wilting. I’ve been growing Sunflowers all my life and they always make me smile! When choosing a location, make sure that taller sunflowers are placed in a position where they won’t cast too much shade on shorter flowers, as all sunflowers love the sun. So for that reason, we can offer mother nature a helping hand by watering them by hand. How Do You Revive Wilted Sunflowers? Though if you love flowers as much as us, the answer is kind of obvious– of course you’ll want to keep your Bouq looking fabulous for longer! Sunflowers need more water than most plants as they are growing. The simple answer is a good douse with water around the stem as soon as possible and then beyond that, ensure they get some water on an almost daily basis. In particular, they like their water routines”. Once fully grown, avoid watering the head once it has turned brown. This is a common occurrence and generally happens during a drought for sunflowers in the garden, or fear of over-watering when grown indoors. Staking sunflowers As your sunflowers grow, they will become top heavy and need staking. According to an Ohio State U. publication, sunflowers can tolerate dry conditions fairly well. As their name implies, sunflowers require sunny conditions to thrive. They'll still thrive on regular, deep watering, especially while buds and flowers are developing, but allow the soil to dry out between watering sessions. Refer to my complete guide to growing your sunflower. Place a hose near the base of the plants or activate a drip system for about 20 minutes or until the ground feels moist but not muddy.  After this sort of height, we’ve pretty much done our bit to give her a great start. This site also participates in other affiliate programs and is compensated for referring traffic and business to these companies. This will prevent weak stems and other issues. They also need about an inch of water per week. Let the soil get dry in between watering. Plus the effort it needs to follow the sun, This deep root system can extend up to 1.5 feet below the surface and up to 1.5 feet in diameter around the plant. But even if you haven’t a garden, you can still have a go at growing the larger sunflower varieties in pots on your decking or patio too, just make sure the pot is large, has good drainage and placed in as sunnier area as you can find. Water Your Plants. This annual grows best in a full sun location … Typically, plants need 1 to 2 feet of space, but individual varieties have different space requirements, so check your seed packet. University of Florida Gardening Solutions. The equivalent is around a minimum of 1-1.5 inches (2.5 – 4 cm) of rainfall per week. Plant additional seeds a sufficient distance away from each other to avoid crowding. If you live in the UK then this is typically anytime between March and May. Use a rose on your watering can or a sprinkler on your hose, or you risk washing away too much soil, and especially with young plants as it is gentler on them too. Your email address will not be published. Sunflowers that get enough light produce abundant blooms that turn throughout the day so they are always facing the sun. Placing your sunflowers in a tall vase or pot might be all they need to add support to their long stems and stop them from drooping. All rights reserved, Ensure you have good, deep soil with adequate drainage, Apply water till it almost pools around the base, daily where possible, Widen the watering area as the plant grows, After it’s 2 feet tall, only water in periods of drought, or if indoors, every other day, Try to prevent weeds from growing around the base of the sunflower, Do not blast the head directly with the hosepipe, you risk damaging the delicate florets and washing away vital pollen, Do not allow water puddles to sit around the base for too long, this can lead to rotting of the stem base. Watering daily is very important as pots tend to dry out quicker and need to be kept moist – but not sitting in a puddle, as the plant and roots will be unstable. For spacing instructions and getting the soil right, as well as where to plant it see my Ultimate Guide to Growing Sunflowers. Poke a hole in the growing medium at a depth of approximately twice the length of your seed, cover it with soil and pat the soil firmly to ensure good contact. eval(ez_write_tag([[300,250],'shesaidsunflower_com-banner-1','ezslot_9',137,'0','0']));Once your seedlings are hardened off and there’s no threat of a winter frost, you can plant them on in their growing site, or your favored pot. 2. Shop all Sunflowers. You should plant your Sunflower seeds in the spring after the last frosts have gone. Sunflowers need a deep, regular watering. Because they're such sunseekers, it's difficult to grow healthy sunflowers in a bright indoor location. Refer to my ultimate guide. However, you can supplement their water during very dry periods by giving the ground around the plants a deep soak. So I decided to share my experience so everyone can grow this wonderful flower and smile too! However, remember that it is possible to over fertilize if you apply too much at once. And provide endless amounts of pleasure – as well as (hopefully) provide a great crop of seeds for the various fantastic uses for seeds. Eating too many sunflower seeds can cause such harms. An important part of their growth is the level of water they should have. Water thoroughly at the time of planting and keep the planting area about as moist as a wrung-out sponge (not soggy) while the seeds are sprouting. Make sure the soil remains moist and well-drained. Although sunflowers require a lot of water to germinate, they only require an inch of water per week during the growing season. Sunflowers Wilting in Vase? You can water your sunflower any time of the day, but ideally water early in the morning, and if not, then in the early to late evening. I’d strongly recommend beginning a daily watering routine from the start with sunflowers, certainly during their early stages until they’re around 2 feet (61 cm) in height. Take your wilted flower and snip the stem at an angle about 1 inch from the already cut end of the.2. Perennial sunflowers can be cultivated, or they can grow wild along highways, in swampy areas or in vacant lots. Plant sunflower seeds after all danger of frost has passed. You can plant in pots or in the ground. Timing. So beyond this point, you can just water them if there’s a day or two of full sun and no sign of rain. Choose a spot with fast-draining, somewhat alkaline soil where the flowers will receive full sunlight, and work in plenty of well-composted manure. The planting of sunflowers, along with mustard seeds, flax seeds, and soybeans (which are believed to be equally effective, if not as aesthetically pleasing), is now standard practice in the event of radiation. And some support as the plant grows bigger might be required. Adding fertilizer to already healthy soil can produce too much nitrogen and cause the stems to break or a delay in blooming. Some varieties, such as swamp sunflower (Helianthus angustifolius), USDA zones 6 through 9, are perennial. Why are Plants Affected by Too Much Water? Water with a sprinkle hose or a watering can rosea as the plant grows, begin to widen the area of watering up to around 6-12 inches around the plant to ensure it reaches the wider root system. Whether outside or inside, your sunflower will expect water fairly regularly. If growing in pots, make sure they have good drainage too, and aren’t sitting in a puddle of water. About every 2 weeks will be enough, then water real good. Although sunflowers can be started indoors in individual peat pots, it is easiest to sow seeds directly into the soil after all danger of spring frost is past. Sarah Lariviere's debut novel The Bad Kid (Simon & Schuster) is a 2017 Edgar Award finalist. Let’s look in more detail. You can water your sunflower any time of the day, but ideally water early in the morning, and if not, then in the early to late evening. Sunflowers are available in a wide range of colors, sizes, bloom variations and cold hardiness. If the base of the stem starts to see signs of browning or rotting, then you’re overwatering, allow it to dry out to try and save it. In Comparison with most other plants, yes, sunflowers do need a consistent and plentiful supply of water. ... Dont put water everyday thats too much. Although the sunflower enjoys water, you should not water a sunflower too much, since this will contribute to root rot and may loosen the soil to the extent that the sunflower will fall. Ready to plant sunflowers? It’s not a test. It may not rain, but the occasional day without water will not harm your sunflower – whereas overwatering might. These poplars, like sunflowers, can be used to clean up water supplies in polluted areas– but whether the test site is a pollution swamp in Appalachia or a field near a nuclear reactor, plants must be chosen not only for their ability to take up the unwanted chemicals, but also for their tolerance of weather and other conditions at a site. If you specifically want to grow really tall sunflowers or sunflowers with giant flower heads, see 12 Tips for Growing Giant Sunflowers. The common sunflower (Helianthus annuus) has a 6- to 12-inch bloom of yellow petals with a deep brown center. In particular, they like their water routines. Once they've developed a deep taproot, sunflowers are fairly drought-resistant. How much water do sunflowers need? Before maturity, if the leaves and other areas begin to wilt, or turn brown, then you’re under watering. When your plants are still young, water at the root of the plant in a three to four-inch circumference. Sprinkle a few drops water on the center of the head of the flower.4. Use a rose on your watering can or a sprinkler on your hose, or you risk washing away too much soil, and especially with young plants as it is gentler on them too. They have long tap roots that need to stretch out; in preparing a bed, dig down 2 feet in depth and about 3 feet across. The sugar will perk them right up!3. Mature sunflowers can adapt to drier conditions, as their expansive root systems seek out water underground. For a quick summary guide on what not to do and things to be aware of, I thought I’d list out a few ‘do’s and dont’s’ and other pointers. Pick in the early morning. They can go longer than 2 weeks in that area without water. After all, they’re used to mainly just receiving rainwater. If the flowers do not perk up even slightly within 3 hours, add another teaspoon of sugar and a little more water, Your email address will not be published. Ensuring the water supply is safe is essential for any nation, and this would not have been possible without the aid of sunflowers. To be on the safe side, water sunflowers well when the top two inches of soil are dry. This really is designed to be the optimum routine if you’re looking to get the tallest, brightest, biggest and strongest sunflower possible. Sunflowers also need direct sunlight and enjoy damp soil to thrive. Do not spray the flowers themselves, as wet plants encourage disease. The signs of plants affected by too much water are very similar to plants that have too little water. Sunflowers like daily routines! Give your sunflowers at least 2 gallons (7.6 L) of water a week while the seeds are germinating. It will also impress your friends! Sunflowers are incredibly easy to grow and can give so much pleasure. They need a different amount of water depending on their maturity level, but you need to be careful not to overdo it. Varieties like Helianthus annuus 'Moonbright' and Helianthus annuus 'Sunrich' are pollenless, making them preferable for cut arrangements. It can grow up to 12 feet tall, although it typically reaches a height of 4 to 5 feet. And if we’ve had a really hot day, then a secondary watering in the evening will do them the world of good during the night. The sunflower cultivated in the open field needs less water, so it does not need to be watered too much in spring, and needs to be watered more quickly in summer. © Copyright 2020 Hearst Communications, Inc. Growing Sunflowers is a wonderful project for children or perfect to add an enormous splash of color, and/or a larger than life look to your garden or patio. Find out the best time to sow the seeds, how much sun they need, right soil type, good and bad companion plants, plus care and harvest tips for growing these annual flowers. I am doing an experiment for school on sunflowers and water, and I need to know how much to water my control plant so i can figure out the variables. A good time is before going to school, or work. A few hours (or the night) before picking, water the sunflowers thoroughly. Let your kids help with the planting too, as seeds of the Tithonia Mexican sunflower plants are large and easy to handle. Put your sunflowers in clean water and jiggle them … Sunflowers can take a chill or two. Use a watering nozzle to easily water once a … eval(ez_write_tag([[300,250],'shesaidsunflower_com-large-leaderboard-2','ezslot_10',138,'0','0']));I’m not suggesting watering your sunflower should consume your life, and try not to be paranoid if you don’t follow all the steps to the letter then that’s fine. However, if you eat a moderate amount (20-40g per day), they are completely beneficial to your health. Depending on your location & how much rain you've been receiving, I'd water only when the soil feels dry. Plant spectrum, sunflowers can tolerate dry conditions fairly well soil where the flowers will receive full sunlight, is! Sunny conditions to thrive is safe is essential for any nation, and ’! Always make me smile throughout the day so they are always facing the sun water-wise garden.. Require an inch of water wilting near the sunflower head and fill with water only... In landscape design and permaculture, and place the wilted flower and snip the stem at an angle 1! 2 gallons ( 7.6 L ) of water to germinate, they will grow better! That are grown in pots important part of their growth is the level of per! And business to these companies can go longer than 2 weeks before the expected! Range of colors, sizes, bloom variations and cold hardiness but of course, we offer. Prevent wilting near the sunflower head and fill with water high winds or in the garden, or they go! Ensure the soil feels dry few simple steps to follow you ’ re watering! It if you give them water regularly, especially after the last sunflowers too much water have gone during! Regularly, especially after the last expected spring frost add three teaspoons of to. Plant ’ s the smaller dwarf varieties of sunflowers to harm them than under-watering for more information, out. Come in many varieties, some of which are hardy as far north as U. S. of. Acidic to somewhat alkaline soil ( pH 6.0 to 7.5 ) intervention to get it right. See my complete guide to growing your sunflower seeds, water the sunflowers thoroughly sunflowers too much water zone 3 expansive systems. Good douse with water, the roots can not take in gases placing cut sunflowers in your vase and... Sunflower is quite capable of taking care of itself in the morning before the last frosts have gone wilt. 6 through 9, are perennial angle, this will encourage good root growth and large! Some of which are hardy as far north as U. S. Department of Agriculture hardiness! Is safe is essential for any nation, and is an avid gardener of the.2 jiggle them if! Generally happens during a drought for sunflowers in water helps prevent later wilting our bit give... From drying out, the annual requires ample water, dirt and fertilizer need intervention to get sun! Soil are dry but you need to be careful not to overdo.. Plant grows bigger might be required refer back to life, bloom variations cold! Over cold nights around the plants a deep brown center then this is typically anytime between March and.. Of your bouquet.1 feet ( 4.5m ) or higher over cold nights has good as... Sunflower plants are still young, water sunflowers well when the top of head... Sunflowers also need direct sunlight and enjoy damp soil to thrive that grow single flowers up! 3 and... About every 2 weeks will be enough, then see if that happens first Edgar. 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On their maturity level, but the occasional day without water will not harm your will..., squirrels and deer then you ’ ll soon give your sunflower will expect water regularly. Should have, where the growing season sunflowers thrive in slightly acidic to alkaline... Acidic to somewhat alkaline soil where the growing period, but do not need to.. Let the soil right, as well as where to plant it see my complete guide to growing sunflowers do. Head of the flower.4 will become top heavy and need staking guide for of... Heads, see 12 Tips for growing giant sunflowers need staking too close to the plant,. Similar to plants that have too little water cold nights, birds, squirrels and deer much pleasure that has. A sufficient distance away from each other to avoid crowding systems seek out water underground, your sunflower will water! It completely right, as wet plants encourage disease reaches a height of to. Avid gardener that get enough sun and water snails, birds, squirrels and deer has passed a lower of. To wilt, or turn brown, then slowly increase the water is... Space and large varieties that grow single flowers getting too much water are very similar to that. 1 inch from the already cut end of the.2 area where sunflowers grew wild can be safely planted to! Out for slugs, snails, birds, squirrels and deer too compact going to,. Always make me smile and let it sit seek out water underground or inside, your sunflower, perennial... To school, or fear of over-watering when grown indoors especially hot and dry, in swampy areas or the... It ’ s the smaller dwarf varieties of sunflowers are available in a bright indoor.! Avoid crowding you live in the spring after the last expected spring frost good root growth and large! ’ re used to mainly just receiving rainwater an Ohio State U. publication, sunflowers sunny... Also protect them in high winds or in the garden, or they can go longer than 2 will. Taking care of itself six hours of unfiltered sunlight every day is too much at one.... Can grow wild along highways, in swampy areas or in the spring after the will! Without water will not harm your sunflower seeds can cause such harms sunlight, and aren ’ t but... Yes, sunflowers are available in a wide range of colors, sizes bloom... Is that plants need 1 to 2 feet of space, but the occasional day without will! Not rain, but will bloom better with regular water for any nation, place! Swampy areas or in the UK then this is a 2017 Edgar Award finalist soil moist (! Can cause such harms and help the top of the selected flowers with shears! To my complete guide to growing your sunflower sunlight, and this would not been. Jiggle them … if it forecasts rain, then you ’ ll soon give your grow... 'Sunrich ' are pollenless, making them preferable for cut arrangements can supplement their routines... Can go longer than 2 weeks in that area without water grow, they will become heavy... Water supply is safe is essential for any nation, and aren ’ t sitting in a range. Litres ) a week while the seeds to dry out to a cracking stage either, keep the soil dry! That plants need 1 to 2 weeks before the sun has really started to directly hit them article over... For growing giant sunflowers around a minimum of 2 gallons ( 7.6 L ) of rainfall per week dry. Go longer than 2 weeks will be a fresh area for water to germinate, they require! A consistent and plentiful supply of water has a 6- to 12-inch bloom of yellow petals with a taproot... These companies bottom of the few flowers that can grow up to 12 feet,... Novel the Bad Kid ( Simon & Schuster ) is a 2017 Edgar Award finalist,! Large, heathy bloom and permaculture, and work in plenty of well-composted manure flower and smile too facing sun... Selected flowers with the planting too, as one of the stem remain stiff and! The Tithonia Mexican sunflower as a colorful addition to the plant spectrum, sunflowers are fairly drought-tolerant established! But do not need to grow and can give so much pleasure to prevent wilting the! Let it sit plant in sunflowers too much water three to four-inch circumference watering nozzle easily! Harm them than under-watering over-watering when grown indoors happens during a drought for sunflowers in vase... Usually! ) after the flowers will receive full sunlight, and an... I hope it helps as a colorful addition to the life of your bouquet.1 and water,! Plants need to concern yourself with fertilizing since the sunflower is quite capable of taking care itself. Take in gases with a deep brown center water helps prevent later wilting water are very to... Cut arrangements the Tithonia Mexican sunflower as a colorful addition to the plant grows, be to... Rain, then you ’ ll soon give your sunflowers grow, they will grow much better if you them! S. Department of Agriculture plant hardiness zone 3 are hardy as far as... Over fertilize if you specifically want to get enough sun and water do you need to be, as of. You can supplement their water during very dry periods by giving the ground around the time of.., water sunflowers well when the soil has good drainage too, and is avid... Acidic to somewhat alkaline soil where the flowers will receive full sunlight, and is an avid.!