Hudson Valley Seed Co.
Mammoth Gray Stripe Sunflower
Helianthus annuus
Certified Organic
All eyes are on the giant sunflowers of August and September, fading regally along with the summer's heat. Easy to grow and extremely vigorous, Mammoth Gray Stripe is a big'un, growing readily to heights of eight to twelve feet. The seed is big and edible and loved by birds.
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Growing instructions
Direct sow in late spring for blooms in August and September. Plant in an area of the garden where Mammoth Sunflowers can grow to mammoth proportions. Sunflowers require direct sun, and tolerate dry conditions, but do need regular watering.
If growing for seed, allow the seeds to mature and dry on the plant (although you will loose some to birds and rodents). Harvest the mature seed heads and let them dry completely in a warm, dry place, safe from critters who can quickly consume the seeds. (Or, a generous gardener can leave the dry seed heads in the garden for the critters, or hang up the seed heads as bird feeders.)
If growing for seed, allow the seeds to mature and dry on the plant (although you will loose some to birds and rodents). Harvest the mature seed heads and let them dry completely in a warm, dry place, safe from critters who can quickly consume the seeds. (Or, a generous gardener can leave the dry seed heads in the garden for the critters, or hang up the seed heads as bird feeders.)
Product Details
| Days to Maturity | 70 days |
|---|---|
| Days to Germination | 10 to 14 days |
| Height at Maturiry | 8 to 12 feet |
| Hardiness Zone Range | Annual |
| Sun Conditions | Full Sun |
| Planting Depth | 1 to 1_ inches |
| Row Spacing | 24 to 36 inches |
| Plant Spacing | 12 to 18 inches |
