Lithospermum latifolium

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Lithospermum Latifolium 4 Lithospermum Latifolium 1 Lithospermum Latifolium 2 Lithospermum Latifolium 3 Lithospermum Latifolium 5 Lithospermum Latifolium
Lithospermum Latifolium 4 Lithospermum Latifolium 1 Lithospermum Latifolium 2 Lithospermum Latifolium 3 Lithospermum Latifolium 5 Lithospermum Latifolium

Lithospermum latifolium

Common Name: American Gromwell

American Gromwell is a robust perennial herb that grows up to 30 inches tall. It is commonly found in mesic to dry woodlands and shaded riverbanks. The plant features small, pale yellow flowers and rough-textured, lance-shaped leaves. Historically, its hard, nut-like seeds were used for medicinal purposes. It is an excellent choice for woodland gardens and naturalized settings where its deep roots help prevent soil erosion.

Characteristics

Type Forb
Sun Partial Sun, Shade
Soil Clay, Loam, Sand/Gravel, Calcareous
Moisture Dry, Mesic, Wet
Average Max Height (inches) 22
Suggested Plant Spacing (inches) 18
Bloom month(s) May, June
Bloom Color or Type White, Yellow
Dominance Low

Range Maps

Sowing Information

For most homeowners, the recommended method is to hand-broadcast seed at a minimum rate of 16–64 PLS (Pure Live Seed) ounces per acre. To ensure even coverage, broadcast the seed in perpendicular passes across the site. Grass seed should be broadcast first and lightly raked into the soil. Afterward, apply a light mulch layer using clean, seed-free straw or, preferably, our native Little Bluestem straw, available at our retail garden centers. Once mulching is complete, broadcast native wildflower seed over the area without raking it in. A good rainfall or thorough watering will provide sufficient soil contact for successful 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.