Helianthus - Seeds

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Quantity: 60 Bulk Seeds

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Growing Region: 1-10
Height: 18 to 120 inches (45 to 300 cm).
Flowers: Summer and autumn.
Flower Details: Brown/Red Center, yellow flower. Rays and discs. Flat heads.
Foliage: Some perennials have rosette leaves. Commonly sunflowers have a rough, hairy branched stem and sticky ovate leaves; these become narrower further up the stem.

Sow Outside: 1/4 inch (6mm). Following last frost. Spacing 12 to 40 inches (30 to 100 cm).

Sow Inside: Use peat pots. Germination time: one to three weeks. Temperature 70 to 80°F (21 to 27°C). Three weeks in advance. Transplant outdoors following the last frost.
Requirements: Full sunlight or light shade. Grows in most soils, best results in deep, rich soils of pH 5 to 7 that have good drainage. Provide support. Occasional light feed. Regular watering. Pinch tips. Cutback perennials to the ground in autumn. Propagate perennials by division in spring in cold areas or in autumn in warmer areas.

How to grow
If growing Helianthemum outside then it is best to sow sunflower seeds outdoors at a depth of 6mm following the last frost of spring. Sunflowers like to grow in a sunny or partially shaded area that has good drainage. they can be grown in most soils but if you want to grow big sunflowers then use a soil that is of pH5 to 7, deep and rich.
You can start to grow sunflowers indoors first. When planting sunflower seed indoors sow them in peat pots about three weeks before the last frost of spring. They will take about 10 days to germinate at a temperature of 21 to 30 degrees centigrade. The sunflower seedlings should then be transplanted about a metre apart after the last frost of spring.

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