screwbean mesquite
Prosopis pubescens · Fabaceae
screwbean mesquite (Prosopis pubescens) is a perennial tree in the Fabaceae family. It is native to North America. USDA records it as hardy in zone 6 and warmer, down to about -3°F.
At a glance
| Type | tree Derived |
|---|---|
| Lifecycle | perennial USDA |
| Native status | native USDA |
| Mature height | 25 ft USDA |
| Light | part-shade USDA |
| Water need | medium USDA |
| Growth rate | rapid USDA |
| Soil pH | 7.5–9 USDA |
| Bloom | March–April USDA |
| Hardiness zones | 6 and warmer USDA |
| Guild layer | understory 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 grows in partial shade. USDA rates it as having moderate water needs. Its drought tolerance is rated medium. It will not tolerate waterlogged soil — USDA rates its anaerobic tolerance as none. It is recorded on soils from pH 7.5 to 9 — alkaline ground. Its cold limit is zone 6.
Size and growth
At maturity it reaches about 25 ft, making it a substantial woody plant. It grows quickly.
Bloom period
USDA records a bloom period of March through April.
A flowering date, not a pollinator rating.
Foliage, flower and season
Summer foliage is green, fine in texture. Its flowers are conspicuous. Its fruit or seed heads are conspicuous, extending interest past flowering. Its active growth period is spring, summer, fall. USDA rates its lifespan as moderate.
What the site needs to provide
USDA records it across sites receiving 6 to 15 inches of annual precipitation. The low end of that band is genuinely arid, so it has a wide tolerance for dry country. It needs at least 200 frost-free days to finish its season. It roots to at least 24 inches. Fertility requirement: low — no feeding needed on ordinary garden soil.
Propagating it
It takes readily from seed, cuttings, bare root and container stock. USDA records no cold-stratification requirement, so seed should germinate without a chilling period. It does not spread vegetatively, so it will stay where you put it.
Resilience and wildlife
Browsing animals find it highly palatable, so expect deer and rabbits to take an interest. Its fire tolerance is rated medium, and it can resprout after damage. Its growth form is recorded as single stem.
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 Prosopis
- honey mesquite Prosopis glandulosa
Similar role and hardiness
- Uruguayan pampas grass Cortaderia selloana
- parsley hawthorn Crataegus marshallii
- Franklin tree Franklinia alatamaha
- little walnut Juglans microcarpa
- crapemyrtle Lagerstroemia indica
Where this data comes from
Every value on this page comes from the USDA PLANTS database record for symbol PRPU, 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, Edible, fall conspicuous, fertility requirement, fire tolerance, 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, vegetative spread rate, Water need.
- Derived by a fixed rule from those columns: Guild layer, Type.
Read our full data sources and methodology.
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