Western Gromwell
Lithospermum ruderalefam. Lamiaceae
Educational content — not medical, botanical, or professional advice. Plant identification, safety, and edibility depend on local conditions, cultivars, and correct identification. Consult a qualified botanist or forager before consuming or handling wild specimens. How we source & review →
Pl. FAD5 — Lithospermum ruderale
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IOverview
Overview
Western Gromwell (Lithospermum ruderale) is a perennial herb found in the native ranges of Alberta, British Columbia, California, Colorado, Idaho, Montana, Nevada, Oregon, and parts of Wyoming and Washington. This plant thrives in full sun to partial shade and can tolerate various soil types, including light (sandy), medium, and heavy (clay) soils with a pH between 6 and 7.8. It is known for its edible seed, making it a valuable resource for those interested in foraging. Western Gromwell grows up to 0.8 meters tall and is adaptable to dry to moist conditions, making it a hardy addition to gardens or natural landscapes within USDA Hardiness Zones 4-8.
Quick answers
What is Western Gromwell?
Western Gromwell (Lithospermum ruderale) is a perennial herb found in the native ranges of Alberta, British Columbia, California, Colorado, Idaho, Montana, Nevada, Oregon, and parts of Wyoming and Washington.
Growingconditions · propagation · uses
VCultivation
Cultivation
Western Gromwell thrives in full sun and prefers well-drained to moist soils with a pH between 6 and 7.8. It is hardy in zones 4-8 and can grow up to 0.8 meters tall as a perennial forb/herb. For best results, plant it in light (sandy), medium, or heavy (clay) soil types. Ensure the soil remains dry to moist but avoid overwatering. Propagate through seed for new plants.
Light
Full sun
Water
Dry, Moist
Soil
Light (sandy), Medium, Heavy (clay)
Hardiness
4-8
Life cycle
Perennial
Habit
Forb/herb
Mature size
0.8 m tall
Soil pH
6–7.8
For first-time growers
How to grow Western Gromwell for the first time
8steps
Start with Western Gromwell by ensuring you have the right conditions and care, making it a manageable project for beginners.
- 1
What you'll need
Seeds or seedlings, a garden fork, compost, mulch.
- 2
Best time to plant
Plant in spring after the last frost or in fall before the first freeze.
- 3
Soil and container prep
Prepare soil with a mix of light sand and organic matter. Ensure good drainage for dry conditions.
- 4
Sowing or transplanting
Direct sow seeds 1 cm deep, or start seedlings indoors and transplant them after danger of frost passes.
- 5
First two weeks
Keep soil moist until germination. Thin seedlings to about 30 cm apart once they have several leaves.
- 6
Ongoing care
Water sparingly, especially in wetter conditions. Mulch around plants to retain moisture and suppress weeds.
- 7
Harvest or pruning
Prune dead foliage to maintain plant health and appearance. Harvest seeds when they are dry and easily removed from the plant.
- 8
Common mistakes
Overwatering, planting in heavy soil, neglecting to thin seedlings.
VIEdible & utility
Edible & utility
Edible parts:Seed
Edible uses: The Western Gromwell's seeds are edible and can be consumed raw or cooked. They are often prepared by roasting to enhance their flavor before eating. Skip the detailed preparation methods as per the given data.
Other uses:CraftingDye
Contextrange · companions · related
VIIDistribution
12 native · 0 introduced
Distribution
12 native · 0 introducedDistribution across0 continents· 12 native
Broader regions
native:Alberta, British Columbia, California, Colorado, Idaho, Montana, Nevada, Oregon, Saskatchewan, Utah, Washington, Wyoming
IXSpecimen gallery
1 image
Specimen gallery
1 imageXSee also
8 related
See also
8 relatedPlants you might compare or use together — scored by shared family (Lamiaceae), common use cases, and growing requirements.
same family · Lamiaceae
Botanical relatives — often share phytochemistry + growing needs.
XI
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Companion planting
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Growing zone
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