narrowleaf trefoil
Lotus tenuis · Fabaceae
narrowleaf trefoil (Lotus tenuis) is a perennial herbaceous plant in the Fabaceae family. It is introduced to North America rather than native. USDA records it as hardy in zone 4 and warmer, down to about -21°F.
At a glance
| Type | forb-herb USDA |
|---|---|
| Lifecycle | perennial USDA |
| Native status | introduced USDA |
| Mature height | 1 ft USDA |
| Light | full-sun USDA |
| Water need | low USDA |
| Growth rate | moderate USDA |
| Soil pH | 4.5–7.9 USDA |
| Bloom | April–May USDA |
| Flower color | Yellow USDA |
| Hardiness zones | 4 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 high. It handles periodically wet ground (USDA rates its anaerobic tolerance medium). It is recorded on soils from pH 4.5 to 7.9 — a broad range that spans acidic through mildly alkaline ground. Its cold limit is zone 4.
Size and growth
At maturity it reaches about 1 ft, making it a low, mat-forming plant. It grows at a moderate rate.
Bloom period
USDA records a bloom period of April through May. Flowers are yellow.
A flowering date, not a pollinator rating.
Foliage, flower and season
Summer foliage is green, fine in texture. Its flowers are conspicuous. Its active growth period is spring and summer. USDA rates its lifespan as short, so plan on replacing or resowing it rather than treating it as permanent structure.
What the site needs to provide
USDA records it across sites receiving 25 to 50 inches of annual precipitation. It needs at least 160 frost-free days to finish its season. It roots to at least 12 inches. Fertility requirement: medium.
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 slow rate. It does not spread vegetatively, so it will stay where you put it.
Resilience and wildlife
Browsing animals find it moderately palatable, so expect deer and rabbits to take an interest. Its growth form is recorded as single crown.
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 Lotus
- bird's-foot trefoil Lotus corniculatus
- big deervetch Lotus crassifolius
- big trefoil Lotus pedunculatus
- Wright's deervetch Lotus wrightii
Similar role and hardiness
- common bugle Ajuga reptans
- silverweed cinquefoil Argentina anserina
- flexible ceanothus Ceanothus ×flexilis
- prostrate ceanothus Ceanothus prostratus
- Pacific bleeding heart Dicentra formosa
Where this data comes from
Every value on this page comes from the USDA PLANTS database record for symbol LOTE4, 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, Flower color, flower conspicuous, foliage color, foliage porosity winter, foliage texture, frost free days min, fruit conspicuous, growth form, Growth rate, Hardiness zones, Lifecycle, lifespan, 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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