Mammoth Russian Sunflower Seeds

Organic, Heirloom

Availability: In Stock

Native Americans have long valued sunflowers for food, medicine, dye and decoration. The popular 'Mammoth Russian' sunflower has been grown in gardens since the late 1800s. Known for spectacular height, giant flowers and abundant seeds, this easy and fast to grow variety also tolerates drought and poor soil and attracts pollinators. Ideal for a temporary hedge or privacy screen.

$2.29 4 grams

Botanical Name: Helianthus annuus

Family: Asteraceae

Native: North America

Hardiness: Annual

Plant Dimensions: 6'–10' tall

Variety Information: Up to 12"-wide flower with yellow petals and a brown center. Single type.

Exposure: Full sun

Bloom Period: Summer to frost

Attributes: Attracts Pollinators, Cut Flower, Drought Tolerant, Heat Tolerant

When to Sow Outside: RECOMMENDED. 1 to 2 weeks after your average last frost date.

When to Start Inside: 2 to 4 weeks before your average last frost date. Sunflowers are senstive to root disturbance; sow in biodegradable pots that can be planted directly in the ground.

Days to Emerge: 10–15 days

Seed Depth: ¼"–½"

Seed Spacing: A group of 3 seeds every 24"

Thinning: When 3" tall, thin to 1 every 24"

Harvesting: Seeds are ready to harvest when the back of the head has dried and turned brown, about 4 weeks after the flowers have been pollinated. Petals will have wilted and fallen off, and the seeds will be plump, and colored white with gray/black stripes. Seeds ripen around the outside of the flower first; the ones in the center will ripen last. Average yield is approximately 1 pound per head.

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Mammoth Russian Sunflower Seeds Reviews

2 reviews
100 % germination
Review star icon Review star icon Review star icon Review star icon Review star icon Sep 26, 2019
Great flower huge heads quick growing and 100% germination! Planted nearly 50 in the landscape. Heads were dinner plate size and the trunks were huge. I had to cut them down with an ax! Will harvest the seeds. Only drawback was the heads were so heavy that they drooped quickly compared to other varieties so the flooring stage was only about 2 weeks or so.

Russian mammoth
Review star icon Review star icon Review star icon Review star icon Review star icon Oct 30, 2019
I planted them and they all sprouted. The heads were huge and I received nothing but compliments. I would recommend these seeds if you want huge sunflowers... thank you

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