Certified Organic Alta-Swede Mammoth Red Clover

Certified Organic

Certified Organic Alta-Swede Mammoth Red Clover is a tall, quick growing single cut clover. Alta-Swede is taller and coarser than Medium Red Clover and is about 2 weeks later in maturity. It is considered a single cut perennial due to its slow regrowth; thus, it is used primarily as a green manure crop. Alta-Swede is very winter-hardy and does well in most soils and growing conditions.

Organic Alta Swede Mammoth Red Clover is pre-inoculated with an OMRI listed inoculation for improved establishment and growth.
Inoculation is recommended when planting legumes.
*Details on seed coatings, inoculations and our OMRI certificate is available on our Resources Page.

*Organic seeds and grains are grown by organic growers that adhere to the strict organic practices that are required by organic producers. No chemical fertilizer, insecticides or herbicides are allowed in producing this seed. Genetic purity is maintained throughout the production and processing of this seed.

OMRI Listed



Plant at 1/4″ depth. An ideal soil bed is moist, fertile and firm. A soil test is recommended for proper plant establishment and growth. Mammoth Red clovers can be planted, broadcast or frost-seeded successfully.


When using as a green manure crop, till under when in the flowering stage. Alta-Swede Mammoth Red clover will fix up to 80-110 lbs N/Acre. Alta-Swede has a long tap root and can loosen soils and mine phosphorus and other nutrients from deep within soil. Alta-Swede can be planted in the spring or fall and grow in more acid soil (pH 5.0-6.0) than other clovers if lime is applied at the time of seeding. Alta-Swede Mammoth Red Clover averages 248,000 seeds per lb.

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