Sunflower 'Mammoth Russian'

Helianthus annuus

How to grow Sunflower 'Mammoth Russian'

  • Full Sun

  • High

Mammoth Russian likes a position of full sun and remember to water often. Keep in mind when planting that Mammoth Russian is thought of as half hardy, so remember to protect this plant from frosts and low temperatures. Ensure your soil is loamy and clay and has a ph of between 5.7 and 8.1 as Sunflower is a weakly acidic soil to weakly alkaline soil loving plant.

Growing Mammoth Russian from seed

Try to aim for a seed spacing of at least 2.92 inches (7.5 cm) and sow at a depth of around 0.49 inches (1.25 cm). Soil temperature should be kept higher than 13°C / 55°F to ensure good germination.

By our calculations, you should look at sowing Mammoth Russian about 21 days before your last frost date.

Transplanting Mammoth Russian

Ensure that temperatures are mild and all chance of frost has passed before planting out, as Mammoth Russian is a half hardy plant.

Harvesting Mammoth Russian

Sunflower Mammoth Russian Etymology

The botanical epithet is from the Latin annuus meaning “annual”.1

Other Names for Sunflower 'Mammoth Russian'

Giant Russian

Footnotes