How to Grow Trefoil
iNaturalist
Trefoil
Lotus corniculatus
herbTrefoil is a low-growing, nitrogen-fixing legume with distinctive three-leafed clover-like foliage and bright yellow flower clusters. It's commonly used as a cover crop, pasture plant, and ornamental groundcover that attracts pollinators and beneficial insects.
When should you plant Trefoil in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Trefoil timeline · Pittsburgh, PA (Zone 6b)
-
Plant Trefoil
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
Harvest Trefoil
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Trefoil dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9, highly cold-hardy and adaptable
Sign up free to see if Trefoil grows in your zone — and get a personalized planting timeline.
Get my Trefoil timeline →Growth Stages
Germination & Seedling
2-3 weeksTiny seedlings emerge with cotyledons followed by true leaves. Plants are delicate and low-growing.
Keep soil consistently moist but not waterlogged. Provide light once sprouted. Thin to proper spacing.
Vegetative Growth
4-6 weeksPlant develops characteristic three-leafed foliage in dense, low mounds. Root system establishes and begins nitrogen fixation.
Water during dry spells. Minimal fertilizer needed. Weed competition is the main concern. Can tolerate grazing.
Flowering
8-12 weeksBright yellow flower clusters (sometimes with orange or red tinges) appear above foliage. Extremely attractive to pollinators and beneficial insects.
Maintain consistent moisture for best flowering. Deadheading extends bloom. Allow some flowers to set seed if desired.
Seed Production
4-6 weeksFlowers transition to small seed pods containing viable seeds for natural reseeding or collection.
Allow flowers to dry on plant if collecting seed. Pods will shatter when dry. Collect seed before complete shatter.
Dormancy & Regrowth
Ongoing with seasonal cyclesIn cold climates, foliage may die back in winter but roots survive. Plant regrows vigorously in spring. Can be mowed or grazed.
Perennial plant; minimal care needed. Very winter-hardy. Mow in spring if desired to encourage dense growth.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Usually not a major issue; remove by hand if populations high. Maintain habitat for natural predators.
-
Spray with water to dislodge; use neem oil if severe. Natural predators usually control populations.
-
Increase humidity; spray with water. Rarely severe in field settings.
-
and
(in wet conditions)
Improve drainage and air circulation. Remove infected foliage. Use fungicides only if severely affected.
Uses
Edible sprouts and leaves
CulinaryYoung trefoil leaves and sprouts are edible with a mild, slightly sweet clover-like flavor. They can be added to salads, used as garnish, or dried for herbal tea. [source]
Nitrogen-fixing cover crop and soil improvement
HouseholdTrefoil's symbiotic relationship with nitrogen-fixing bacteria enriches soil with bioavailable nitrogen, reducing fertilizer needs in subsequent crops. It's excellent for breaking up compacted soils and improving soil structure. [source]
Pollinator and beneficial insect attraction
WildlifeBright yellow flowers attract honeybees, native bees, butterflies, and beneficial insects. It provides excellent forage and habitat for pollinators throughout the growing season. [source]
Pasture and forage crop
HouseholdHigh-quality, nutritious forage for livestock (cattle, sheep, horses). Palatable, digestible, and well-suited to managed grazing systems. Extremely winter-hardy and persistent. [source]
Traditional herbal remedy
MedicinalHas been used in traditional medicine to support respiratory health and as a mild diuretic. Often combined with other herbs in medicinal preparations. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Trefoil is primarily used as a pasture crop or cover crop and is grazed or mowed rather than hand-harvested. For seed collection, allow flowers to mature and dry on plant, then collect seed pods before complete shattering. For fresh foliage (herbal use), harvest in early flowering stage by cutting stems. Can be harvested multiple times per season for regrowth.
Fun Facts
- 🌱 Trefoil contains naturally occurring compounds like tannins and flavonoids, making it an excellent foraging plant for grazing animals with anti-parasitic benefits.
- 🌱 Unlike many clovers, trefoil is allelopathy-neutral and plays well with other plants, making it ideal for polyculture pastures and diverse seed mixes.
- 🌱 One of the most persistent and long-lived legume forages, trefoil pastures can remain productive for 20+ years with proper management, making it superior to annual clovers for permanent pasture.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Trefoil planting timeline
Tell us your zip code and we'll calculate exactly when to start Trefoil seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Trefoil timeline →