Island Manzanita

Arctostaphylos insularis

Ericaceae · broadleaf evergreen shrub · native

Last updated March 8, 2026

Data Coverage 1 of 6 dimensions

Site Data

Threats

Cultivars

Phenology

GDD Thresholds

Puget Sound

Quick Facts

Hardiness

Zone Zones 8a–8b

Origin

Santa Cruz Island, one of the five Channel Islands which

Diseases (5)

Thielaviopsis basicola Black Root Rot Abiotic or fungal Leaf Gall Symptom category — not a single disease Leaf Spot Phytophthora spp. Phytophthora Dieback Thekopsora minima and Naohidemyces vaccinii Rust

Pests (3)

Aphidoidea Aphid Otiorhynchus spp. Root weevil Tamalia coweni Aphid (Manzanita leafgall aphid)