Eastwood's manzanita
Arctostaphylos glandulosa
Also known as: Del Mar manzanita, Eastwood's manzanita, Zaca manzanita
- Native to:
- Mexico, United States
Franz Xaver





Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Ericaceae
- Genus:
- Arctostaphylos
- Species:
- Arctostaphylos glandulosa
- USDA Symbol:
- ARGL3
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Shrub
- Height:
- 200 cm
- Light Requirements:
- Part Shade
- Drought Tolerance:
- High
- Bloom Months:
- feb,mar,apr
- Bloom Colors:
- white, pink
- Evergreen Shrub:
- Yes
- Landscaping Shrub:
- Yes
Wildlife Benefits
- Bees:
- ★☆☆☆☆ Documented bee visitation (GBIF)
- Butterflies & Moths:
- ★☆☆☆☆ Documented Lepidoptera association (GBIF)
Keystone Species Ranking
- Caterpillar Keystone:
- ★★★★☆ Butterfly & moth species supported by this genus (NWF)
- Pollen Specialist Bee Keystone:
- ★★☆☆☆ Native pollen specialist bee species supported by this genus (NWF)
Garden & Ecology Notes
- Wildlife Value:
- birds, bees, butterflies, small mammals
- Deer Resistant:
- Yes
- Fire Ecology:
- Fire adapted — tolerates or benefits from fire
- Fire Notes:
- Resprouts vigorously from basal burls after fire. Seeds also germinate better after fire-induced scarification and heat exposure, though not strictly fire-dependent.
Soil Requirements
- Soil Type:
- sandy, acidic, nutrient-poor soil
- pH:
- 5.5 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- Commonly found in chaparral and coastal scrub habitats.
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 60–90 days
- Scarification:
- Seed coat scarification required before sowing
- Germination Time:
- 30–180 days
- Notes:
- Seeds have thick, hard coats requiring scarification plus cold stratification. Germination can be slow and erratic even with proper treatment.
The above propagation data sourced from Claude AI
Pre-treatment: Seed germination is stimulated by the presence of charred wood or aqueous extracts of it
Establishment: A. glandulosa is found within mattoral vegetation association of California.
Source: npn.rngr.net
ORGHPS Germination Guide: Expose to fluctuation outdoor winter temperatures including freezing for 3 months. Gradually increase light and temperature in the spring. Requires light or the seed is very fine. Surface sow and expose to light. Requires scarification. Nick or rub between sheets of sandpaper. Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard water and any seeds that remain floating. * immerse in boiling water for 20 seconds