Sweet Clover Legume Stand Kit

SKU: BDL-SWCLVR

$55.99 $9.33/lb
  • Covers 2 acres
  • Seeding rate: 3 lb per acre
  • 6 lb bundle
Total Price: $55.99
Estimated Delivery: 15-18 business days

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Rolling prairie field with tall yellow and white sweetclover blooms in the foreground and grazing cattle on grassy hills in the distance.

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What is the Sweet Clover Legume Stand Kit?

The Sweet Clover Legume Stand Kit is a two-species biennial legume planting designed for maximum nitrogen return, deep soil penetration, and multi-year value from a single seeding. Yellow Sweetclover and White Sweetclover are both biennials: they establish a deep taproot and rosette in year one, then bolt, flower, set seed, and die in year two. This two-year life cycle makes them ideal nitrogen-building crops that do not require annual replanting. They tolerate alkaline and disturbed soils better than most clovers, making them a first-choice legume for difficult ground, new agricultural fields, or transitional acreage moving into a regenerative system.

What's in This Bundle

Specifications

Seeding Rate 3 lb per acre
Sun Requirements Full Sun
Time to Germinate Biennial — blooms and seeds in year 2

Seeding Specs

Water Needs Low to moderate — tolerates drought
Soil Preference Adaptable — tolerates alkaline, dry, and disturbed soils
Soil pH 6.5 – 8.0
Planting Depth 1/4 – 1/2 inch

Establishment Specs

Height 24 – 72 inches
Color Yellow, White (bloom)
Uses Nitrogen Fixation, Green Manure, Pollinator Habitat, Cover Crop
Native/Introduced Introduced (naturalized in North America)

Why Choose This Seed?

High Nitrogen Fixation

Well-nodulated sweet clover stands fix 100–175 lb of nitrogen per acre over their biennial life cycle — among the highest of any legume cover crop. When incorporated as a green manure at first bloom in year two, most of that nitrogen becomes available to the following cash crop within 4–8 weeks.

Taproot Compaction Relief

Sweet clover develops one of the deepest taproots of any common legume — penetrating 4–6 feet in favorable conditions. These roots fracture hardpan layers, improve drainage, and deposit organic matter well below the tillage zone. When the plant dies after year two, the decomposing root channel becomes a permanent macro-pore for water and subsequent crop roots.

Premier Pollinator Plant

Sweet clover is considered one of the top honey plants in North America. A single acre in full bloom provides abundant nectar and pollen for honeybees, native bees, and monarch butterflies during the critical early-summer bloom window. Both Yellow and White varieties bloom sequentially, extending the pollinator resource window.

Alkaline Soil Tolerance

Most clovers struggle above pH 7.5. Sweet clover thrives on alkaline, calcareous soils where alfalfa, red clover, and most brassicas perform poorly. This makes it an invaluable legume option for the high-pH soils of the western Great Plains, irrigation districts, and any field with a history of overliming.

Companion Crop Versatility

Sweet clover has a long history as a companion crop seeded with small grains in spring. The grain provides canopy protection during establishment. After small grain harvest, the sweet clover emerges from the stubble as a full-season nitrogen-building stand — all without an extra planting pass or soil preparation.

How to Use the Sweet Clover Legume Stand Kit

Site Prep

Sweet clover establishes on a wide range of seedbeds, including rough or disturbed ground. For row-crop integration, prepare a firm seedbed.

For companion cropping with small grains, no additional prep is needed — broadcast or drill with the grain. Lime to at least pH 6.5 if soil pH is below 6.0.

Seeding

Drill at 1/4 to 1/2 inch depth or broadcast at 3 lb per acre and cultipack. Inoculate with fresh Rhizobium meliloti inoculant immediately before seeding.

Do not allow inoculated seed to sit in direct sun. Scarify hard-coated seeds by running through a scarifier or against rough concrete if germination is uneven.

Establishment

Sweet clover establishes a rosette in year one and builds root reserves. It may appear unremarkable above ground.

Do not mistake slow early growth for failure — the plant is investing in its taproot. Light grazing or mowing in year one is acceptable.

Protect from overgrazing during the first growing season.

Termination or Management

Terminate as a green manure by mowing or incorporating at first bloom in year two — this is when nitrogen content per unit biomass is highest. If used as a pollinator resource, allow to bloom and set seed before killing the stand.

The biennial naturally dies after seed set, so volunteer stands may occur in subsequent years.

Helpful Resources

Clover Seed Planting Guide

Clover Seed Planting Guide

Learn more about Clover Seed Planting Guide
More than Luck: Why You Should Add Clover to Your Lawn Grass

More than Luck: Why You Should Add Clover to Your Lawn Grass

Learn more about More than Luck: Why You Should Add Clover to Your Lawn Grass
Frost Seeding Clover Into an Existing Pasture

Frost Seeding Clover Into an Existing Pasture

Learn more about Frost Seeding Clover Into an Existing Pasture

Questions & Answers

What is the difference between Yellow and White Sweetclover?
Yellow Sweetclover (Melilotus officinalis) grows taller — often 4–6 feet — and produces more biomass per plant. It is slightly more tolerant of wet soils. White Sweetclover (Melilotus albus) is shorter and bushier, establishes more aggressively on dry and alkaline soils, and blooms slightly later, extending the overall bloom window. Both fix similar amounts of nitrogen.
Does sweet clover need to be scarified?
Sweet clover seed can have a significant hard-seed fraction — sometimes 20–40% of seed lot — that resists germination in year one. Scarification breaks the seed coat and improves first-season germination. Many commercial seed lots are pre-scarified. Check your seed tag. If germination test shows below 70%, scarify before planting.
Is sweet clover safe for cattle to graze?
Fresh, properly cured sweet clover hay and live grazing are generally safe. However, moldy or poorly cured sweet clover hay contains dicoumarol — a compound that interferes with vitamin K and can cause hemorrhagic disease in cattle. Never feed spoiled or moldy sweet clover hay. Grazing live, growing sweet clover is safe under normal management.
How do I maximize nitrogen release to the next crop?
Terminate sweet clover at first bloom in year two when the nitrogen-to-carbon ratio in the biomass is most favorable for rapid decomposition. Incorporate shallowly or crimp and leave as mulch. Allow 4–6 weeks of decomposition before planting the cash crop. Moist, warm soils dramatically accelerate nitrogen release compared to cold or dry conditions.
Will sweet clover reseed itself?
Yes, if allowed to set seed before termination. This can be desirable in perennial pasture or pollinator corridor systems where naturalized sweet clover is welcome. In row-crop systems where volunteer plants are unwanted, terminate at first bloom before seed set. Self-seeded sweet clover is easy to manage with tillage or herbicide.
Can I use this kit for roadside or conservation area seeding?
Yes. Sweet clover is widely used in conservation seedings, highway rights-of-way, mine reclamation, and disturbed-ground stabilization. It establishes on poor, rocky, and alkaline soils where other legumes fail. Note that it can spread aggressively — check with your local conservation district before seeding in or adjacent to native prairie remnants.

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