Mammoth Gray Stripe Sunflower

Mammoth Gray Stripe Sunflower

Helainthus annuus
The quintessential giant sunflower, towering and delightfully ragged by late summer.

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Details

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.
Number of Seeds 100 seeds
Spacing in Row 12 to 18 inches
Spacing Between Rows 24 to 36 inches
Planting Depth 1 to 1.5 inches
Days to Germination 10 to 14 days
Days to Maturity 70 days
Height at Maturity 8 to 12 feet
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.)

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