Did You Know?
Sunflowers (Helianthus annuus) are native to North America and have been in cultivation by indigenous peoples for over 5000 years. Young sunflowers track the sun from east to west through the day while mature flowers stay in one position typically facing the morning sun.
Types of Sunflowers
There are over 70 different species of sunflowers and hundreds of hybrids. Varieties differ by the height of the plant plus the size and color of the flower. Many sunflowers have been developed as ornamentals and can be a few inches to over 9 feet tall – the record sunflower was over 30 feet tall. Sunflowers come in a wide range of colors including red, orange, yellow, green, pink, purple and combinations of colors. The largest flowers can grow up to 18 inches in diameter. Texas has several native sunflowers and, on our property, the common sunflower (H. annuus) and the Maximilian sunflower (H. maximiliani) grow wild. For the best edible seed production, the varieties Giant Russian, Mammoth and Grey Stripe are recommended. The Jerusalem artichoke (H. tuberosus) is also a native North American sunflower. This is a perennial sunflower (not from Jerusalem and not an artichoke) that produces edible tubers used as a root vegetable.
When to Plant
Sunflowers are a warm season annual that can be direct seeded after the last frost. Successive plantings can be made to mid-Summer to provide for a longer flowering period. Sunflowers like fertile soil and good moisture. As the name implies, they also like lots of sun. The tallest sunflowers should be planted where they get some protection from strong winds, or they can be staked. Sunflowers for seed take from 2 to 3 months to flower then another month or so to mature.
Harvest and Storage
Sunflowers are ready to harvest after the flower petals have turned brown and dry and the back of the flowers have lost their green color. Note that birds will try to beat you to the seeds. Cut the flower heads off with loppers leaving a few inches of stem as a “handle” and hang the flower heads by the stem in a cool dark place for a couple of more weeks to completely dry. Once completely dry, the seeds can be rubbed off the flower heads. The seeds are edible as is, but roasting brings out an even more nutty flavor. Store in airtight bags or freeze for long term storage. For the truly ambitious, shell roasted seeds then blend with a bit of oil and salt for sunflower butter.
By: Michael Vidrine

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