Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Rosaceae

Genus:

Rubus

Species:

Rubus × immanis

USDA Symbol:

RUIM

Growth Characteristics

Life Cycle:

Perennial

Growth Habit:

Subshrub

Height:

200 cm

Light Requirements:

Full Sun

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 or cutting.

Soil Requirements

Soil Type:

rich, well-drained loamy soil

pH:

5.5 - 7.0 (slightly acidic to neutral)

Drainage:

excellent drainage required

Moisture:

consistently moist

Notes:

prefers forest edges and clearings

Propagation & Germination

Stratification:

Cold/moist stratification required — 90–120 days

Germination Time:

30–90 days

Notes:

Rubus seeds often have erratic germination and may require extended cold stratification. Fresh seed germinates better than dried seed.

The above propagation data sourced from Claude AI