12 Sunflowers Facts for Beginner Gardeners (2024)

12 Sunflowers Facts for Beginner Gardeners (1)

One of the reasons sunflowers are so special has to do with their bright appearance. Just looking at them can lift your mood. (We're not counting that amongst our sunflower facts; you get that one for free.)

"Sunflowers make people happy," Raleigh Wasser, horticulture manager for the Atlanta Botanical Garden says via email. "It might be the bright petals around the central face that is so attractive to people."

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Resembling the sun, those vibrant yellow petals (also known as "rays") indeed make these "happy flowers" the perfect gift to bring joy to someone's day. But there is much more to these cheery flowers than meets the eye.

Contents

  1. There Are So Many Varieties
  2. They're Easy to Grow
  3. The Tallest Sunflower Measured 30 Feet (9 Meters)
  4. It's Difficult to Extend the Life of the Rays
  5. Sunflowers Need Lots of Sun
  6. They Can Track the Sun
  7. Greek Mythology Tells Why Sunflowers Face the Sun
  8. Sunflowers Are an Important Food Source
  9. One Sunflower Produces Around 1,000 Seeds
  10. You Can Harvest Sunflower Seeds
  11. You Also Can Make Sunflower Oil
  12. They Are Ukraine's National Flower

1. There Are So Many Varieties

When picturing these flowers you might think of yellow sunflowers, but they come in many sizes and colors, such as red sunflowers. More than 70 cultivars of Helianthus exist, with the common sunflower species being Helianthus annuusHelianthus meaning helios (or sun) and anthus (flower), according to Wasser.

"Within all of these species are an abundance of different colors and forms, ranging from small to very large, from having yellow petals to red," he says. "Extensive crossing and hybridizing have resulted in a large number of cultivars that greatly expand the range of flower colors (ray flowers in bright and pastel shades of yellow, red, mahogany, bronze, white and bi-colors) and flower head shapes (short rays, long rays, some doubles).

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"There are dwarf varieties (1 to 3 inches [2.5 to 7.6 centimeters] tall) and mammoth varieties (up to 15 feet [4.5 meters] tall)," he adds. "The flower heads on mammoth varieties can reach 12 inches [30 centimeters] in diameter. Disk flowers give way to the familiar sunflower seeds."

2. They're Easy to Grow

12 Sunflowers Facts for Beginner Gardeners (2)

In fact, sunflower plants are so easy to grow, Wasser says, that they sometimes sprout up under bird feeders that have simply dropped seeds.

But in general, he adds, if you want to plant them, you should sow the seed directly into the soil after the danger of frost has passed in spring. You can also start the seeds indoors and transplant the sunflower buds.

You can plant perennial sunflowers of the Helianthus genus (as opposed to annuals) in spring or fall. Seeds should sprout in seven to 10 days, and depending on the variety, sunflowers will bloom after a couple of months, based on growing conditions, with the flower maturing and developing seeds in 80 to 120 days.

"You don't need to use fertilizer for most garden soils," Wasser says. "Even if your soil is very poor, you won't need more than a light application of slow-release granular fertilizer. The flowers are drought-tolerant and do fine with an occasional watering in the driest weather."

Sunflowers might need staking when they're younger and haven't developed a strong root system, especially if they are tall and developing a heavy head. Make sure the roots have adequate space and loose enough soil to spread.

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3. The Tallest Sunflower Measured 30 Feet (9 Meters)

12 Sunflowers Facts for Beginner Gardeners (3)

In 2014, Guinness World Records verified that Hans-Peter Schiffer broke a record with his towering sunflower plant, which measured just over 30 feet (9.17 meters).

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4. It's Difficult to Extend the Life of the Rays

Unfortunately, once a sunflower is in the ground and blooming, there's not much you can do to keep those rays. "If the variety has many stems, the grower can deadhead spent flowers to redirect growth to the remaining buds," Wasser says.

If you want to cut the flowers and put them in a vase, Wasser suggests changing out the water out every two to three days.

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When you do freshen the water, cut the base of the stems at a 45-degree angle (do this while they're under warm running water). And keep the cut flowers away from direct light and from high humidity.

5. Sunflowers Need Lots of Sun

Ideally, sunflowers should get full sun for at least eight hours a day, Wasser says. "If their requirement for plenty of direct sun is met," he says, "they will reward you with long-lasting blooms throughout summer and sometimes into fall."

While sun is the most essential ingredient, taller sunflower varieties — like 'Sunzilla,' which grows up to 16 feet (4.8 meters) tall — also need protection from wind, he adds.

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6. They Can Track the Sun

Immature flower buds of the sunflower exhibit solar tracking, and on sunny days, the buds will follow the sun across the sky from east to west. By dawn, the buds will have returned to face eastward. However, fixed in one position, mature sunflowers face east as their stems stiffen.

Flowers of the wild sunflowers seen on roadsides do not follow the sun, and their flowering heads face many directions when mature. The sunflower leaves do exhibit some solar tracking.

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7. Greek Mythology Tells Why Sunflowers Face the Sun

12 Sunflowers Facts for Beginner Gardeners (4)

In Greek mythology, the story of the nymph Clytie and Helios (the sun god) is one of love and betrayal. Clytie loves Helios and at first, he loves her, too. But soon he betrays Clytie and falls in love with Leucothea, daughter of Orchamus.

Because of her jealousy, Clytie tells Leucothea's father of the relationship. Helios is only angered by her decision and he punishes her by burying her alive. Clytie, though, still loves Helios and lays naked for nine days staring at the sun, without food or water.

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On the ninth day, she becomes a flower — the heliotrope or sunflower — and turns toward the sun.

8. Sunflowers Are an Important Food Source

Originally cultivated by North American Indians in present-day Arizona and New Mexico around 3000 B.C.E., the sunflower has a long and interesting history as a food plant. Some archaeologists suggest the sunflower may have been domesticated before corn.

The various American Indian tribes used the flowering plants in many ways: Seed was ground or pounded into flour for cakes, mush or bread; some tribes mixed the meal with other vegetables, such as beans, squash and corn; and the seed was cracked and eaten for a snack.

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There also are references that they squeezed the oil from the seed and used it to make bread.

9. One Sunflower Produces Around 1,000 Seeds

Sunflower heads can contain as many as 1,000 to 2,000 seeds. Each seed can be quite different when it comes to appearance, but the most common kind used for snacking has a black-and-white striped pattern on the hull.

Other types of seeds (such as the white or black sunflower seeds) are fully edible but are typically used for other purposes, such as for sunflower oil.

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10. You Can Harvest Sunflower Seeds

12 Sunflowers Facts for Beginner Gardeners (5)

For edible sunflower seeds, you need to grow the annual variety (Helianthus annuus). "You must harvest the flowers after the leaves shrivel, but before the seasonal rains," Wasser says. "The flower heads (including 1 to 2 feet [30 to 60 centimeters] of stalk) must spend another month hanging in a dry, well-aired spot before you extract the seeds."

Once you've done that, try your hand at roasting the seeds.

11. You Also Can Make Sunflower Oil

Homemade sunflower seed oil can have multiple purposes, including cooking or for beauty products. One recipe requires 35 pounds (15.8 kilograms) of oilseeds, though you'll net 3 gallons (11.3 liters) of oil. That means if you're growing your own sunflowers, you'd need the seeds of about 140 plants!

12. They Are Ukraine's National Flower

Historically, Ukraine is the biggest sunflower oil exporter in the world. Spaniards introduced sunflowers to Europe in the 17th century, and by the mid-18th century, they had made their way to Ukraine. Sunflowers became prevalent throughout the country.

Now That's Interesting

Vincent van Gogh's sunflower paintings opened the door to a new evolution in décor and art. "Not only did van Gogh inspire others to paint sunflowers, but he also created a trend that would span various lifestyles and personas," according to the Van Gogh Gallery, the definitive reference for information about the artist's life and work. "His infamous sunflowers altered many views on color schemes, exaggerated features and stereotypically beautiful flowers in minimalistic form."

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12 Sunflowers Facts for Beginner Gardeners (2024)
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