Japanese clover
Kummerowia striata · Fabaceae
Japanese clover (Kummerowia striata) is a annual herbaceous plant in the Fabaceae family. It is introduced to North America rather than native. USDA records it as hardy in zone 7 and warmer, down to about 8°F.
At a glance
| Type | forb-herb USDA |
|---|---|
| Lifecycle | annual USDA |
| Native status | introduced USDA |
| Mature height | 1.3 ft USDA |
| Light | full-sun USDA |
| Water need | low USDA |
| Growth rate | rapid USDA |
| Soil pH | 4.9–7.3 USDA |
| Bloom | March–April USDA |
| Flower color | Purple USDA |
| Hardiness zones | 7 and warmer USDA |
| Guild layer | ground-cover Derived |
| Nursery availability | Routinely Available USDA |
USDA quoted from the USDA PLANTS database · Derived computed by a fixed rule from those columns. No value on this page is estimated.
Growing conditions
It needs full sun. USDA rates it as having low water needs once established. Its drought tolerance is rated medium. It is recorded on soils from pH 4.9 to 7.3 — a broad range that spans acidic through mildly alkaline ground. Its cold limit is zone 7.
Size and growth
At maturity it reaches about 1.3 ft, making it a low, mat-forming plant. It grows quickly.
Bloom period
USDA records a bloom period of March through April. Flowers are purple.
A flowering date, not a pollinator rating.
Foliage, flower and season
Summer foliage is green, fine in texture. Its flowers are not conspicuous — a plant for form and foliage. Its active growth period is spring and summer.
What the site needs to provide
USDA records it across sites receiving 30 to 65 inches of annual precipitation. It needs at least 160 frost-free days to finish its season. It roots to at least 8 inches. Fertility requirement: low — no feeding needed on ordinary garden soil.
Propagating it
Seed is the only propagation method USDA lists. Division and cuttings are not listed as options. USDA records no cold-stratification requirement, so seed should germinate without a chilling period. Its seed spreads at a rapid rate. It does not spread vegetatively, so it will stay where you put it.
Resilience and wildlife
Browsing animals rate it barely palatable — the sourced basis for calling it deer-resistant. Its fire tolerance is rated medium. Its growth form is recorded as multiple stem.
Role in a guild
Ground cover. In a layered planting this is the lowest layer — it shades soil, holds moisture, and suppresses weeds. The layer is derived by a fixed rule from growth habit and mature height.
Tags
Related plants
Others in Kummerowia
- Korean clover Kummerowia stipulacea
Similar role and hardiness
- southwestern pricklypoppy Argemone pleiacantha
- Australian saltbush Atriplex semibaccata
- sulphur-flower buckwheat Eriogonum umbellatum
- California poppy Eschscholzia californica
- Rainier pleated gentian Gentiana calycosa
Where this data comes from
Every value on this page comes from the USDA PLANTS database record for symbol KUST2, or is computed from those values by a fixed rule. Nothing here is estimated or model-generated. Where USDA publishes no value, this page omits the claim rather than filling the gap.
- Quoted from USDA PLANTS: active growth period, Bloom, Bloom end, browse palatability, cold stratification, Drought tolerance, fall conspicuous, fertility requirement, fire tolerance, Flower color, flower conspicuous, foliage color, foliage porosity winter, foliage texture, frost free days min, fruit conspicuous, growth form, Growth rate, Hardiness zones, Lifecycle, Light, Mature height, Minimum temperature, Native status, Nitrogen fixation, Nursery availability, precipitation max in, precipitation min in, propagation, resprout ability, root depth in, seed spread rate, Soil pH, Soil pH (upper), Tolerance of wet soil, Toxicity, Type, vegetative spread rate, Water need.
- Derived by a fixed rule from those columns: Guild layer.
Read our full data sources and methodology.
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