Mammoth Gray Stripe Sunflower

Certified Organic Seed

Helianthus annuus

Towering, delightfully ragged blooms.

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.

We are currently selling stock of this product that is Packed for 2020. Learn more.

from $3.50

UnitPriceQuantityAvailability
100 Seeds $3.50 Out of Stock
1 Ounce $6.50 Out of Stock
4 Ounces $10.95 Out of Stock

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.)

Days to Germination 10 to 14 days
Days to Maturity 70 days
Planting Depth 1 to 1½ inches
Spacing in Row 12 to 18 inches
Spacing Between Rows 24 to 36 inches
Height at Maturity 8 to 12 feet
Sun Preference Full Sun

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