Eastwood's manzanita

Arctostaphylos glandulosa

Also known as: Del Mar manzanita, Eastwood's manzanita, Zaca manzanita

Native to:
Mexico, United States

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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

Source: Ontario Rock Garden & Hardy Plant Society