Puerto Rico palmetto
Sabal causiarum · Arecaceae
Puerto Rico palmetto (Sabal causiarum) is a perennial tree in the Arecaceae family. It is native to North America. USDA records it as hardy in zone 9 and warmer, down to about 28°F.
At a glance
| Type | tree USDA |
|---|---|
| Lifecycle | perennial USDA |
| Native status | native USDA |
| Mature height | 50 ft USDA |
| Light | full-sun USDA |
| Growth rate | slow USDA |
| Soil pH | 6–8 USDA |
| Bloom | June–August USDA |
| Flower color | White USDA |
| Hardiness zones | 9 and warmer USDA |
| Guild layer | canopy 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. Its drought tolerance is rated medium. It is recorded on soils from pH 6 to 8 — a broad range that spans acidic through mildly alkaline ground. Its cold limit is zone 9.
Size and growth
At maturity it reaches about 50 ft, making it a substantial woody plant. It grows slowly.
Bloom period
USDA records a bloom period of June through August. Flowers are white.
A flowering date, not a pollinator rating.
Foliage, flower and season
Summer foliage is green, coarse in texture. Its flowers are conspicuous. Its active growth period is fall, winter and spring. 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 30 to 55 inches of annual precipitation. It needs at least 340 frost-free days to finish its season. It roots to at least 36 inches. Fertility requirement: medium.
Propagating it
Propagate it from seed and bare root. USDA records no cold-stratification requirement, so seed should germinate without a chilling period.
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 stem.
Role in a guild
Canopy. In a layered planting this is the tallest layer of a planting — it sets the light budget everything beneath it lives on. The layer is derived by a fixed rule from growth habit and mature height.
Tags
Related plants
Others in Sabal
- dwarf palmetto Sabal minor
- cabbage palmetto Sabal palmetto
Similar role and hardiness
- tamarind Tamarindus indica
Where this data comes from
Every value on this page comes from the USDA PLANTS database record for symbol SACA, 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, Soil pH, Soil pH (upper), Toxicity, Type.
- Derived by a fixed rule from those columns: Guild layer.
Read our full data sources and methodology.
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