Redwood Seeds Russian Mammoth Sunflower

These sunflowers are true giants, capable of reaching heights of up to 12 feet (144 inches) when grown in optimal conditions. Be sure to plant them in a spot where they won't shade out your smaller garden crops.

Yes, the Russian Mammoth is an heirloom variety prized for producing large, protein-rich seeds that are completely edible. Once the flower heads dry out in the fall, you can harvest the seeds for snacking or bird feed.

Given their massive height and heavy flower heads, staking is highly recommended, especially if you live in an area prone to strong winds. Providing a sturdy support system will prevent the stalks from snapping as they reach maturity.

Yes, because these are open-pollinated heirloom seeds, you can successfully save the seeds from your harvest to plant in future seasons. They will grow true to type, unlike hybrid varieties.

Russian Mammoth sunflowers require full sun, meaning at least 6 to 8 hours of direct sunlight per day. They will not perform well in partial shade and may become leggy or fail to produce their signature large heads.

While this variety is bred to be heat- and drought-resistant, 'resistant' does not mean 'drought-proof.' They will establish well in tough conditions, but they still require regular watering during their initial growth phase and during extreme dry spells to reach their full potential.