United States Edition

Sunflower 'Mammoth Russian'     

Helianthus annuus

Mammoth Russian is a popular variety of Sunflower, which belongs to the Helianthus genus (Helianthus annuus 'Mammoth Russian'). Blooms appear in these approximate colours:   Burn Yellow and   Burn Yellow and   Burn Yellow. Leaves appear approximately as a   Android robot green colour.

Tall stalks with huge flowers make this a most unusual garden flower. Blooms mid to late summer. A classic cut flower.

Plant 1/2 inch deep, space 3 inches apart. When 3 inches tall, thin to 16 inches apart. Height is 8 to 12 feet.

A type of Flower, it mainly grows as an Annual plant - which means it typically only grows best for a single growing season. Mammoth Russian is known for growing to a height of approximately 3.00 metres (9.75 feet). This variety tends to bloom in mid summer.

As Mammoth Russian Sunflower is a low maintanence plant, it is great for beginner gardeners and those that like gardens that don't need much overseeing.

This plant info is provided by the myfolia gardener's wiki. All details about Sunflower 'Mammoth Russian' have been kindly provided by our members.

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. The USDA Hardiness Zones typically associated with Mammoth Russian are Zone 4 and Zone 9. 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 2.93 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' information

How long does Mammoth Russian take to grow?

These estimates for how long Sunflower 'Mammoth Russian' takes to sprout, grow and harvest are from real observations from real gardeners, right around the world. Start logging and journaling your observations to participate!

When should I sow Mammoth Russian?

Folia's when to plant Sunflower 'Mammoth Russian' estimates are relative to your last frost date. Enter your frost dates and we'll calculate your sowing and planting dates for you!

Sunflower Mammoth Russian Etymology

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

Other Names for Sunflower 'Mammoth Russian'

Giant Russian

Latest Sunflower 'Mammoth Russian' Reviews

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