Ground Plum (Astragalus crassicarpus)

Ground Plum

Astragalus crassicarpus

Astragalus crassicarpus, commonly known as Ground Plum, is a low-growing perennial that typically reaches 4 to 24 inches in height. It has pinnately compound leaves and produces clusters of purple to pink pea-like flowers in early spring, followed by edible, plum-like seed pods. This species is commonly found in dry prairies and open fields, preferring well-drained sandy or loamy soils. Ground Plum has been used historically as a food source by Native Americans. In landscaping, it is valued for its early blooms and unique fruit, making it suitable for rock gardens and prairie restorations.

Characteristics

Type	Forb
Sun	Full Sun
Soil	Sand/Gravel, Calcareous
Moisture	Dry, Mesic
Average Max Height (inches)	16
Suggested Plant Spacing (inches)	15
Bloom month(s)	April, May
Bloom Color or Type	Violet
Dominance	Medium

Range Maps

Sowing Information

Sow seed onto a firm, weed-free seedbed. Hand-broadcast seed making two perpendicular passes for even coverage. If planting a mix, broadcast the grass component first and lightly rake/drag it into the top 1/8–1/4" of soil. Next, broadcast wildflower/forb seed and press it into the soil surface (with a roller/cultipacker or the back of a rake) to ensure good seed-to-soil contact. After seeding, apply a very light layer of clean, seed-free straw (or other weed-free, site-appropriate mulch) to reduce erosion and retain moisture without smothering seedlings. A good rainfall or thorough watering will help settle seed and mulch and improve germination.

Planting Information

Dig a hole in your planting site slightly larger than the plant’s root system. When placing the plant into the hole, ensure that the soil line remains consistent with its original level in the pot. Fill in around the roots with the excavated soil, gently firming it to eliminate air pockets. Water the plant thoroughly the same day to promote successful establishment.