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Flower
Flowering
Mammoth Sunflower
Helianthus annuus
Towering sunflowers that track the sun. The bees love them and the seeds will feed the birds come autumn.
177 days growingFull sunDeep water weekly
Growth tickets
Seed
May 10, 2026Sown directly after last frost.
Sprout
May 21, 2026Strong seedlings pushed through the soil.
4.00 cm
Vegetative
Jun 25, 2026Stalk is thickening quickly. Staked against wind.
90.00 cm
Flowering
Aug 10, 2026Bud opened to a bright yellow face. Bees arrived within hours.
210.50 cm