The illustrated growing guide

Crimson Clover

Trifolium incarnatum

Family Fabaceae

Grown as an annual

Botanical illustration of Crimson Clover
Annual · Trifolium incarnatum

The prettiest cover crop there is — a fall or spring sowing that fixes nitrogen, smothers weeds, and erupts into a breathtaking sheet of crimson flower spikes that bees and beneficial insects mob, before you turn it under to feed the soil. Sow it in bare beds over winter (mild zones) or before summer crops, and terminate at bloom. Beauty and soil-building in one packet.

AnnualFull SunModerate waterFast growthAttracts beesNone winter chill

Where to buy the plant — 1 nursery

Red Clover — a print from the Tea Herbs collection

From the print shop

The closest print we make

We don’t print Trifolium incarnatum. The closest we have is Trifolium pratense (“Red Clover”) in the Tea Herbs collection — the same genus, Trifolium, not the same species.

16 designsfrom $21.99white or black groundmatte poster, unframed

Shop Tea Herbs botanical prints →

I

Overview

Will crimson clover suit your garden, and what goes wrong.

Will it fruit where you are?

Enter your ZIP — we look up your USDA hardiness zone (2023 map) and check it against what crimson clover actually needs.

Life cycleAnnual
Winter chillNone

Crimson Clover at a glance

Life cycleAnnual
Mature size1-2 ft
PollinationA gorgeous BEE and beneficial-insect magnet in bloom
Chill requirementNone (not chill-dependent)
Bloom seasonSpring (stunning crimson flower spikes)
Harvest seasonCover crop — cut/till at flowering as green manure; also a beautiful bee forage
Growth rateFast

Common crimson clover problems

  • Almost none
  • Almost none

II

Growing

Light, water, soil, propagation and the season’s jobs.

How to grow crimson clover: light, water & soil

LightFull Sun
WaterModerate
SoilAny; nitrogen-fixer · pH 6.0 - 7.0
FertilizerNone — it MAKES nitrogen
PruningCut/till at bloom — Sow in fall (overwinters in mild zones) or early spring; it fixes nitrogen, smothers weeds, and blooms a knockout crimson before you till it in. Terminate at flowering for maximum nitrogen, before it sets hard seed.
SpacingBroadcast dense

How to plant & propagate crimson clover

PropagateFrom seed

III

The year

What crimson clover asks for, month by month.

The crimson clover year, month by month

MonthJanFebMarAprMayJunJulAugSepOctNovDec
Bloom

What each band means

  • Bloomflowers open — pollinators working, frost on blossoms is the danger.

The crimson clover year as text

  • Jan quiet month
  • Feb quiet month
  • Mar bloom
  • Apr bloom
  • May bloom
  • Jun quiet month
  • Jul quiet month
  • Aug quiet month
  • Sep quiet month
  • Oct quiet month
  • Nov quiet month
  • Dec quiet month

These are the species' typical months — expect them a few weeks earlier in warm zones and later in cold ones. Watch the plant, not just the calendar.

IV

Ecology & uses

What it does for the garden, and what it is grown for.

Crimson Clover in the garden system

  • Groundcover layer annual
  • N-fixer
  • Nectary/insectary
AttractsBees
MoistureFacultative / average
DeerBrowsed — protect young plants
OriginIntroduced

What crimson clover is grown for

✓ Commonly eaten

UseNitrogen fixing
UseBee forage
UseWeed smothering
UseGreen manure

Harvesting & storing crimson clover

Cover crop — cut/till at flowering as green manure; also a beautiful bee forage.

Edibility, identification, and traditional-use notes here are general reference — not medical or veterinary advice, and not a claim that any plant treats or prevents anything. Medicinal ratings record how strongly a plant features in herbal tradition, nothing more. Never eat or dose a plant you have not positively identified. More on how to use this library.

V

Cultivars

Named varieties of crimson clover, ruled as a catalogue.

Best crimson clover varieties & cultivars

'Dixie'; 'AU Robin' (reseeding)

VI

Sources & plant ID

Where the care distinctions come from, and how the plant is filed.

Research basis

Sources behind this profile

No extension citations are attached to crimson cloveryet. The care figures below come from the library's own catalogue rather than a traced primary source.

Plant ID

BinomialTrifolium incarnatum
FamilyFabaceae
TypeAnnual
USDA symbolTRIN3
OriginIntroduced
Invasive riskLow

VII

Where to buy

Third-party nurseries — not Story Thyme Farms.

Third-party nurseries, not Story Thyme Farms. Prices are theirs.

Story Thyme Farms may earn a small commission from these links, at no cost to you — it never changes what we recommend.

VIII

Questions

Crimson Clover questions, answered straight.

Is crimson clover safe for kids and pets?

Crimson Clover is commonly eaten and isn't considered toxic, but "commonly eaten" isn't a guarantee for any particular person or animal — allergies, quantity, and which part you eat all matter. Never eat a plant you haven't positively identified, and check with a vet before letting pets or livestock graze anything new.

When do you harvest crimson clover?

Cover crop — cut/till at flowering as green manure; also a beautiful bee forage.

How do you propagate crimson clover?

From seed.

IX

Elsewhere

Where crimson clover sits in the library.