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Sunflowers (Helianthus annuus) are annual plants native to North America that grow extraordinarily well in Colorado. This place can withstand light frosts, plus so is an excellent choice for earlier planting if you just may’t wait to get started in your garden. Sunflowers track the sun during their bud stage via a organic phenomena called “heliotropism,” by means of which drive cells from the stem only below the bud cause the head off to follow the sun like it moves out of east to west. It returns to the eastward orientation at evening. Inside later levels of the flower’s life, the stem thickens also the sunflower ceases movement and confronts only eastward. One to numerous blooms (depending on which of the 60 species you place) begin bursting mid- to late-summer and last through the fall. The yellow, orange or bronze heads are made upwards of hundreds about tiny flowers named florets. Here are some tips for planting sunflowers if you reside in Colorado.

Difficulty: Moderately Simple

Instructions

Things You'll Require

Sunflower seeds

2 Sow seeds 1½ inches deep also 6 to 12 inches apart on total sun also soil that is well drained and lean (such as clay loam). Place them next to annuals, evergreens or herbs.

4 Water the plants. Sunflowers will grow nearly anywhere by nominal watering, although they should occasionally be watered deeply.

5 Protect the plants. Sunflowers have few enemies, plus diseases similar whereas rust may be avoided if you choose some rust-resistant seed plus rotate the plants so the ailment doesn’t establish itself in the soil.

Tips & Cautions

Allow the stalks to endure after the plant dies; the dried flowers will feed birds all through the winter and reseed the following spring. Don’t plant sunflowers with your vegetable garden. Greater levels about nitrogen will encourage the plant to grow high, nevertheless it will have far fewer blooms.

Resources

All about sunflowers

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