Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Rosaceae

Genus:

Rubus

Species:

Rubus alumnus

USDA Symbol:

RUPA13

Growth Characteristics

Life Cycle:

Perennial

Growth Habit:

Subshrub

Height:

150 cm

Light Requirements:

Part Shade

Drought Tolerance:

Medium

Bloom Months:

may,jun

Bloom Colors:

white

Keystone Species Ranking

Caterpillar Keystone:

★★★★★ Butterfly & moth species supported by this genus (NWF)

Garden & Ecology Notes

Wildlife Value:

birds, small mammals

Fire Ecology:

Fire adapted — tolerates or benefits from fire

Fire Notes:

Resprouts vigorously from root crown following fire; often increases in abundance in post-fire environments.

Propagation & Germination

Stratification:

Warm then cold/moist stratification (double dormancy) — 90–120 days

Germination Time:

30–90 days

Notes:

Double dormancy typical for Rubus; warm stratification followed by cold stratification improves germination rates.

The above propagation data sourced from Claude AI