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Astéracées • Helianthus annuus
Giant Mammoth Sunflower - Organic
$4.49
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The giant Mammoth sunflower , Helianthus annuus, is one of those companions that transforms the vegetable garden into a true landscape. With its imposing stature and large golden inflorescences, it creates a vertical landmark in the living garden, visible from afar and appreciated by both humans and small wildlife.
Throughout the changing seasons, this sunflower silently follows the light, first offering broad, inviting foliage, then large flower heads adorned with thousands of blossoms that attract pollinators. In late summer, the seed-laden heads become a sought-after food source for birds, extending its beneficial presence in the garden's ecosystem.
écoumene seeding advice
Seeding type
Indoor and outdoor seeding
Germination time
5-12 jours
Germination temperature
21° to 27° Celsius
Sowing depth
Sow seeds 2-3 cm deep
Transplantation
Difficult Transplantation
Technical
Row sowing
Growing conditions
Number of days to maturity
Harvest at ± 110 days
Hardiness zone
Zone-3b
Distance between plants
40 cm
Distance between rows
60 cm
Optimal brightness
Sun plant
Soil texture
Loose (silty) soil
Soil moisture
Cool, well-drained soil
Soil fertility
Plant very demanding in bacteria-dominant compost
optimal soil pH
acidic pH
Average plant height
300 cm
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