Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Brassicaceae

Genus:

Physaria

Species:

Physaria obcordata

USDA Symbol:

PHOB

Growth Characteristics

Life Cycle:

Perennial

Growth Habit:

Forb/herb

Height:

15 cm

Light Requirements:

Full Sun

Drought Tolerance:

High

Bloom Months:

apr,may,jun

Bloom Colors:

yellow

Garden & Ecology Notes

Deer Resistant:

Yes

Soil Requirements

Soil Type:

rocky, well-drained, calcareous soil

pH:

7.0 - 8.0 (neutral to slightly alkaline)

Drainage:

excellent drainage required

Moisture:

dry to moderate

Notes:

native to shale outcrops in Colorado

Propagation & Germination

Stratification:

Cold/moist stratification required — 30–60 days

Germination Time:

14–30 days

Notes:

Seeds require cold stratification and well-drained substrate; germination can be erratic.

The above propagation data sourced from Claude AI