Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Apocynaceae

Genus:

Amsonia

Species:

Amsonia tharpii

USDA Symbol:

AMTH

Growth Characteristics

Life Cycle:

Perennial

Growth Habit:

Forb/herb , Subshrub

Height:

45 cm

Light Requirements:

Full Sun,Part Shade

Drought Tolerance:

High

Bloom Months:

mar,apr,may

Bloom Colors:

blue, pale blue

Wildlife Benefits

Bees:

★☆☆☆☆ Documented bee visitation (GBIF)

Butterflies & Moths:

★☆☆☆☆ Documented Lepidoptera association (GBIF)

Garden & Ecology Notes

Wildlife Value:

bees, butterflies

Deer Resistant:

Yes

Fall Color:

yellow, golden

Soil Requirements

Soil Type:

sandy, well-drained, nutrient-poor soil

pH:

6.0 - 7.5 (slightly acidic to neutral)

Drainage:

excellent drainage required

Moisture:

dry to moderate

Notes:

native to rocky outcrops and sandy areas

Propagation & Germination

Stratification:

Cold/moist stratification required — 30–60 days

Germination Time:

14–30 days

Notes:

Seeds benefit from cold-moist stratification for improved germination rates. Light aids germination.

The above propagation data sourced from Claude AI