How to Grow Lewisia Ashwood Strain
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Lewisia Ashwood Strain
Lewisia cotyledon 'Ashwood Strain'
flowerLewisia Ashwood Strain is an improved cultivar of bitterroot featuring vibrant, densely clustered flowers in shades of pink, coral, orange, yellow, and white with contrasting veining. This alpine perennial produces attractive rosettes of fleshy, succulent-like foliage and is prized for rock gardens, troughs, and alpine containers. The Ashwood Strain represents superior selection for flower color range and vigor compared to the species type.
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Example Lewisia Ashwood Strain timeline · Pittsburgh, PA (Zone 6b)
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Plant Lewisia Ashwood Strain
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Lewisia Ashwood Strain blooms
Mid-to-late summerBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 6-8, hardy to zone 5 with winter protection
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Germination & Seedling
4-6 weeksTiny seedlings emerge 10-14 days after sowing under cool, bright conditions. First true leaves are fleshy and small.
Keep soil barely moist, not wet. Provide bright light but not intense heat. Maintain cool temperatures (55-65°F if possible). Ensure excellent air circulation to prevent fungal issues.
Rosette Development
6-12 months before first flowersPlant forms a compact, low-growing rosette of fleshy, lance-shaped leaves in shades of green, often with reddish tinges.
Gradually acclimate to outdoor conditions if starting indoors. Water sparingly; let soil dry between waterings. No fertilizer needed—these alpines prefer lean soil. Keep crown dry to prevent rot.
Flowering
8-12 weeks (typically late spring through early summer)Flower buds emerge from the center of the rosette, developing into dense, upright flower spikes 4-8 inches tall with 15-25 individual blooms in vibrant colors with darker veining.
Provide consistent light and air circulation. Water at soil level, never overhead. Deadhead spent flowers to encourage continued blooming. Avoid fertilizers high in nitrogen.
Seed Production & Summer Rest
6-8 weeksIf flowers are left unfertilized, seed pods develop. In mid-to-late summer, foliage may become dormant or semi-dormant as the plant enters a rest phase.
Reduce watering as growth slows. Allow foliage to yellow naturally; do not remove until completely dry. Ensure excellent drainage during summer rains. Minimal intervention needed.
Winter Dormancy
3-4 months (December–March in most zones)Plant enters dormancy with minimal or no visible growth; rosette may shrink slightly and become less colorful.
Virtually no watering needed in winter; soil should be nearly dry. In areas with heavy winter precipitation, provide overhead protection (cloche, frame, or shelter) to prevent waterlogging. Cold hardy but not wet-cold hardy. Move container plants to a cold frame or unheated greenhouse.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to dislodge; use insecticidal soap or neem oil if severe. Inspect regularly in spring.
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Increase humidity slightly around foliage (but not crown); spray with water or use horticultural oil. Ensure good air circulation.
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Hand-pick, especially at night. Use copper tape barriers around containers. Avoid overhead watering which attracts them.
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Prevent with excellent drainage and dry crown conditions. Remove affected plants immediately. Ensure gritty, fast-draining soil. Do not overwater.
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Improve air circulation; avoid wetting foliage. Apply sulfur dust or fungicide if needed. Occurs in humid, stagnant conditions.
Uses
Historical Native American food
CulinaryLewisia cotyledon corms were traditionally harvested and eaten by Native American tribes of the Pacific Northwest. The bulbous roots are edible when cooked and were an important seasonal food source. [source]
Alpine rock garden specimen
HouseholdThe vibrant, multicolored flowers and compact growth habit make Lewisia Ashwood Strain ideal for ornamental rock gardens, alpine troughs, raised beds, and container displays on patios and terraces. [source]
Container and trough cultivation
HouseholdPerfectly suited to alpine pots, hypertufa troughs, and alpine house cultivation due to compact size and exceptional drainage requirements. Popular for alpine plant enthusiasts and collectors. [source]
Pollinator attraction
WildlifeThe vibrant flowers attract bees, butterflies, and other pollinators, making Lewisia a valuable nectar source in rock gardens during late spring and early summer. [source]
Cut flower arrangement
CraftLong-lasting flower spikes are excellent for alpine and miniature flower arrangements, adding bright color and structural interest to floral designs. [source]
Harvest Tips
Lewisias are ornamental flowers, not harvested for food or material. Cut flowers for arrangements by removing entire flower spikes at their base with a sharp knife. Cut in early morning when fully open. Deadhead spent flowers to extend blooming. Collect seed pods in late summer if desired; allow to dry fully on the plant, then harvest and store in cool, dry conditions for spring sowing.
Fun Facts
- 🌱 Lewisia is named after Meriwether Lewis of the famous Lewis and Clark Expedition, which first documented the plant during their exploration of the American West.
- 🌱 The common name 'bitterroot' refers to the bitter taste of the plant's corms; bitterroot is the state flower of Montana and held sacred significance in Native American cultures.
- 🌱 The Ashwood Strain was developed through careful selection at Ashwood Nurseries in England and represents one of the finest ornamental strains available, with exceptional color range including rare yellows and oranges not common in wild populations.
Gardening Terms
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