Peaceful Valley Sunflower Russian Mammoth Description
Annual USDA Zones 3-10
Native to North America
Open pollinated. Organically grown. This variety is the result of Russian breeding efforts and returned to the US in 1880 then as now under the name "Russian Mammoth." This giant sunflower has bright gold flowers that can grow easily to 10" across. Produces a single flower, filled with grey and white striped edible seeds.
Blooms late summer to fall
Attracts bees and butterflies; leaves are favored by finches
Adaptable to various, moderately fertile soil types
Plant seed 6" apart and 1/2" deep after spring frost. Thin to 8-12" when plants reach 2" in height.
Plant in spring
Planting depth 1/2"
Days to germinate 7-14
Plant height 10-15'