coast cockspur grass
Echinochloa walteri · Poaceae
coast cockspur grass (Echinochloa walteri) is a annual grass or grass-like plant in the Poaceae family. It is native to North America. USDA records it as hardy in zone 10 and warmer, down to about 32°F.
At a glance
| Type | graminoid USDA |
|---|---|
| Lifecycle | annual USDA |
| Native status | native USDA |
| Mature height | 6.5 ft USDA |
| Light | full-sun USDA |
| Water need | high USDA |
| Growth rate | moderate USDA |
| Soil pH | 3.8–9.4 USDA |
| Bloom | June–August USDA |
| Flower color | Green USDA |
| Hardiness zones | 10 and warmer USDA |
| Guild layer | understory Derived |
| Nursery availability | Contracting Only 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 needs consistently moist ground. Its drought tolerance is rated low. It tolerates saturated, poorly drained ground well (USDA rates its anaerobic tolerance high). It is recorded on soils from pH 3.8 to 9.4 — a broad range that spans acidic through mildly alkaline ground. Its cold limit is zone 10.
Size and growth
At maturity it reaches about 6.5 ft, making it a plant that will finish above head height. It grows at a moderate rate.
Bloom period
USDA records a bloom period of June through August. Flowers are green.
A flowering date, not a pollinator rating.
Foliage, flower and season
Summer foliage is green, medium in texture. Its flowers are not conspicuous — a plant for form and foliage. Its active growth period is summer.
What the site needs to provide
USDA records it across sites receiving 28 to 50 inches of annual precipitation. It needs at least 120 frost-free days to finish its season. It roots to at least 14 inches. Fertility requirement: low — no feeding needed on ordinary garden soil.
Propagating it
Propagate it from seed and sprigs. 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
Its fire tolerance is rated medium. Its growth form is recorded as bunch.
Role in a guild
Understory. In a layered planting this is the layer beneath the canopy, tall enough to hold structure but shaded from above. The layer is derived by a fixed rule from growth habit and mature height.
Tags
Related plants
Others in Echinochloa
- jungle rice Echinochloa colona
- billion-dollar grass Echinochloa frumentacea
Similar role and hardiness
- papaya Carica papaya
- grapefruit Citrus ×paradisi
- pale touch-me-not Impatiens pallida
- guava Psidium guajava
- Portia tree Thespesia populnea
Where this data comes from
Every value on this page comes from the USDA PLANTS database record for symbol ECWA, 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, 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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