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Scientific name:	Trifolium hybridum
Cultivars:	Diploid types(common variety mostly used in North America) Tetraploid types (large leaves, flowers, late maturing, and are mostly European)
Origin:	Sweden; in North america since ~1840
Growth Habit:	Upright
Life Cycle:	Perennial
Use
Production:	Hay, pasture, soil improvement
Nutritive Value:	High and palatable; May cause bloat.
Herbaria Image:	Click this link
Identification
Seed Head:	Capitulum or capitate (globose head), white to pink flowers
Seed:	Mitten shaped, 1/4", color ranges from yellow, to tan, to brown or dark/black 680,000 seeds/lb Seed production average is 400-500 lb/acre Inoculate with proper N-fixing bacteria type (if seed is not coated or pre-inoculated).
Shoot:	Smooth; many tillers from crown
Leaf:	No water marks, leaflets with blunt tip and finely serrated margins
Adaptation
Soil:	Prefers silty clay loams
pH:	Wide range 5.5 to 7.5, tolerates more acid pH than red clover and more alkalinity than most clovers
Moisture:	Requires sufficient rainfall or irrigation. Not drought tolerant. Tolerates waterlogged conditions for up to 6 weeks.
Temperature:	Winter hardy Well adapted to harsh winter climates and high elevation.
Other:	Not shade tolerant.
Establishment - Management
Seeding rate:	2 to 4 lb/acre (alone), 1 to 2 lb/acre (mixes). Expected plants/sq ft: 2 to 3
Seed cost:	$4/lb; $8 to 16/acre (alone), $4 to 8/acre (mixes)
Planting date:	Early April to mid May late summer seeding possible with irrigation but needs ~6 weeks before frost
Planting depth:	1/8 to 1/4 inch
Frost seeding:	Establishes well, expect 2 to 3 plants/sq ft
Fertilization:	P and K according to soil test. May require micronutrients.
Grazing:	Rotational grazing recommended. Tolerates close grazing.
Hay:	Harvest when in full bloom. Ripe seed in hay can cause slobbers in horses. Makes good hay in mixes with red clover.
Notes
In mixes, grass height should be maintained as to not shade the clover. Can cause photosensitivity and liver damage in horses Needs cross-pollination by bees to produce seed