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Ericaceae family

Otay Manzanita Arctostaphylos otayensis

Native Specialist-bee host
Early-season nectar — Flowers in a late-winter / early-spring window when few other plants in our catalog bloom — valuable early forage for pollinators (relative to our catalog's bloom coverage).

Otay Manzanita is a perennial shrub native to the lower 48 states. It blooms Jan – Jun. A host for pollen-specialist native bees.

More about this plant

Arctostaphylos otayensis is a species of manzanita commonly known as the Otay manzanita. It is a rare perennial shrub native to the mountains of southwestern San Diego County, California and northwestern Baja California, where it grows in chaparral habitats on metavolcanic soils, mostly in the San Ysidro Mountains. The white urn-shaped flowers bloom from winter to spring. Because of the small range of this species and a number of threats, it is of conservation concern. Wikipedia →

Growing & care

USDA PLANTS · TRY
Conditions
Sources · Conditions
Cold hardiness (derived) — Hardiness
Hardiness
≥ zone 11 derived from its U.S. range
Size & form
Sources · Size & form
USDA PLANTS — Lifespan
Lifespan
Perennial
In the garden
Shrub layer — Sits in the shrub of a layered food forest or polyculture.Open guide →
derived roles
The garden year bloom → fruit → fall colour
J
F
M
A
M
J
J
A
S
O
N
D
Bloom
Bloom (the flower's colour)
Bloom · Jan – Jun — 32 obs · Herbarium specimens — Park et al. 2023 (CC BY 4.0)
Species characteristics from USDA PLANTS (public domain) + TRY (CC BY) — general guidance, not a guarantee for your exact site. Deer "browsing" is documented palatability, not a deer-proof claim.

Wildlife & pollinators

How pollinator value is scored →
❧ Caterpillar hosts ~17 caterpillar species

Arctostaphylos supports ~17 caterpillar species.

Native butterfly & moth caterpillars are the base of the terrestrial food web — most songbirds rear their young almost entirely on them. As a host for native Lepidoptera this is a moderate genus.

Recorded feeding on Arctostaphylos in North America, including:

Acronicta perdita · owlet moth Aethaloida packardaria · geometer (inchworm) moth Amorbia cuneanum · leafroller moth Amphipyra pyramidoides · Copper Underwing Anacamptodes clivinaria · Mountain Mahogany Looper Anarta cordigera · owlet moth
+ 8 more species →
Ancylis comptana · leafroller moth Antaeotricha manzanitae · concealer moth Apharetra californiae · owlet moth Argyrotaenia franciscana · Orange Tortrix Aseptis ethnica · owlet moth Aseptis fumeola · owlet moth Aseptis perfumosa · owlet moth Automeris cecrops · Cecrops Eyed Silkmoth
Keystone count (genus-level) from Warren II 2026 (CC0) · Tallamy host-use records. Named species (a documented Nearctic sample, not exhaustive) from NHM HOSTS (CC0).
✦ Bees specialist-bee host

Specialist native bees depend on it.

Some native bees are pollen specialists (oligolectic) — they raise young only on pollen from particular plant genera. Arctostaphylos is a recorded specialist-bee host, so losing it can mean losing the bee that relies on it.

Xerces pollinator conservation →
Specialist hosts from Smith et al. 2024.
Species thumbnails re-hosted from iNaturalist — Creative Commons, credited per image (hover for credit). Click any species to see it on iNaturalist. Not exhaustive; many taxa have no openly-licensed photo yet.
Sources for this entry (14) Open & cited
[01] Scientific name & family — USDA PLANTS (DwCA, Zenodo 17903503)
[02] Growth habit & duration — USDA PLANTS (DwCA, Zenodo 17903503)
[03] Native status & distribution — USDA PLANTS (DwCA, Zenodo 17903503)
[04] Common name — USDA PLANTS (via GBIF)
[05] Invasive / introduced status — USDA PLANTS (DwCA, Zenodo 17903503) — native status
[07] Description — Wikipedia (CC BY-SA)
[08] Ecological value — Warren II 2026 (CC0) · Tallamy host-use counts · Smith et al. 2024 (CC BY)
[10] Conservation rank — NatureServe Explorer (CC BY)
[11] Cold hardiness (derived) — Derived from U.S. range × USDA PHZM zones
[12] Caterpillar host count — Warren II 2026 (Dryad, CC0) · Tallamy host-use counts
[13] Caterpillar species — NHM HOSTS (CC0)
[14] County range — GBIF Open Data — open-licensed occurrences (CC0/CC-BY) → county
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PlantKey’s data is open under CC BY-SA 4.0 — free to reuse and adapt, with attribution and the same licence. Photos keep their own per-image licence + credit (see Sources above).

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