How to Grow Ajuga Black Scallop
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Ajuga Black Scallop
Ajuga reptans 'Black Scallop'
ground coverAjuga Black Scallop is a low-growing perennial ground cover prized for its deep purple-black foliage that becomes even darker in cooler seasons. It produces short spikes of deep blue flowers in spring and spreads vigorously via stolons, making it excellent for filling in garden beds and borders. This cultivar is a dramatic improvement over standard green ajuga for ornamental impact.
When should you plant Ajuga Black Scallop in your zone?
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Example Ajuga Black Scallop timeline · Pittsburgh, PA (Zone 6b)
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Plant Ajuga Black Scallop
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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Harvest Ajuga Black Scallop
Around Apr 21≈ 4 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Ajuga Black Scallop dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9, with best performance in zones 4-8
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Get my Ajuga Black Scallop timeline →Growth Stages
Establishment
2-4 weeksYoung plants with several rosettes of dark purple foliage, runners beginning to form at leaf axils
Keep soil consistently moist for first 2-3 weeks; apply 2 inches of mulch around plants; remove any competing weeds
Vegetative Growth
Several monthsFoliage becomes denser and darker as temperatures cool; stolons actively spread and develop new plantlets
Water during dry spells; allow runners to root in soil; thin crowded areas if coverage becomes too dense; fertilize lightly with balanced fertilizer in spring
Flowering
3-4 weeks (spring)Short spikes (4-6 inches tall) of deep blue-purple flowers emerge from foliage in spring
Flowers are attractive to pollinators; no deadheading required but can remove spent flowers for neat appearance; continue regular watering
Post-Flowering
Summer through fallFlowers fade; plant refocuses energy on foliage and stolon production; black coloration deepens in fall/winter
Resume moderate watering; allow plant to consolidate; prepare for winter in cold zones by ensuring good drainage to prevent rot
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Improve air circulation; avoid overhead watering; apply sulfur fungicide or neem oil if severe; remove affected leaves
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Ensure excellent drainage; avoid overwatering and waterlogged soil; remove and destroy affected plants; apply fungicide containing chlorothalonil or copper if needed
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and
Remove debris and dense mulch where they hide; use copper tape barriers; hand-pick at dusk; apply iron phosphate slug bait
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Increase humidity and air circulation; spray with water to dislodge; apply miticide or neem oil if infestation is severe
Uses
Ground cover and landscape accent
OrnamentalThe deep black-purple foliage provides dramatic color contrast in shade gardens and borders, creating visual interest year-round. Its low, spreading habit makes it ideal for edging, filling beds, and suppressing weeds. [source]
Pollinator support
WildlifeSpring flowers attract bees, butterflies, and other pollinators, making it valuable for supporting early-season insect populations in gardens. [source]
Traditional herbal remedy
MedicinalAjuga species have been used in traditional herbalism and folk medicine for centuries, with historical applications for various health purposes, though clinical evidence is limited. [source]
Erosion control and slope stabilization
HouseholdThe spreading root system and dense foliage help prevent soil erosion on slopes and banks, while the hardy growth habit requires minimal maintenance once established. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Ajuga is not harvested for produce. Foliage can be cut back in late winter to rejuvenate older plants. Divide and transplant stolons in spring or fall to propagate. Cut flowers for fresh spring arrangements when spikes are fully formed.
Fun Facts
- 🌱 The name 'bugleweed' refers to the trumpet-like shape of the small individual flowers, which resemble bugles or cornets.
- 🌱 Ajuga Black Scallop foliage becomes deepest black-purple in fall and winter cold, then gradually lightens again as spring warmth arrives.
- 🌱 This cultivar was selected specifically for its dramatically dark foliage compared to species ajuga, and the scalloped leaf margins add textural interest even when plants are not flowering.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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