Giant Sunflower - Helianthus
This perennial species, native to the Americas, can grow up to 2.50 m tall and has numerous yellow flowers with wide petals. It has a tendency to invade by spreading rhizomes.
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in the ground, in bucket
After storing seeds for a few weeks in the fridge, sow in cups 2 to 3 weeks before planting. Transplant with the root ball after the last frosts, 1 m apart in all directions. Transplanting is a delicate operation, but it allows earlier flowering and offers protection against slugs, which are fond of young seedlings. It is also possible to sow in place, in rows spaced apart, after the last frosts.
March, April
April, May
July, August, September, October
in the ground
sunny
medium
fees, furniture, rich
Helianthus giganteus
mid-season
60 seeds
Yellow
From 200 to 250 cm
pointed
North America
