hybrid rose

Rosa carolina subsp. subserrulata

Native to:
Canada, United States

Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Rosaceae
Genus:
Rosa
Species:
Rosa carolina subsp. subserrulata
USDA Symbol:
RORU3

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Subshrub
Height:
150 cm
Drought Tolerance:
Medium
Bloom Months:
may,jun,jul
Bloom Colors:
pink
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)

Garden & Ecology Notes

Wildlife Value:
birds, bees, butterflies, small mammals
Fragrant:
Yes
Fall Color:
red, orange
Fire Ecology:
Fire adapted — tolerates or benefits from fire
Fire Notes:
Resprouts vigorously from root crown following fire; historically maintained in open habitats by periodic burning.

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 organic matter-rich environments

Propagation & Germination

Stratification:
Cold/moist stratification required — 90–120 days
Scarification:
Seed coat scarification required before sowing
Germination Time:
30–365 days
Notes:
Rose seeds have double dormancy; scarification followed by cold stratification improves germination. Germination can be slow and erratic.

The above propagation data sourced from Claude AI

Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).; then Scarify, then cold-moist stratify for 60 days.

Source: Claude AI

ORGHPS Germination Guide: 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. Pulpy coat inhibits germination. Remove by soaking and rinsing in clean water for approximately 7 days. Discard water. * soak in hot water for 24 hours to scarify; plant at 32°C for 2-3 weeks, then 4°C for 4 months

Source: Ontario Rock Garden & Hardy Plant Society