How to Grow Anchusa Dropmore Blue
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Anchusa Dropmore Blue
Anchusa azurea 'Dropmore Blue'
flowerDropmore Blue is a stunning perennial anchusa variety featuring vibrant forget-me-not-like blue flowers on tall, sturdy stems. This cultivar is a dramatic improvement over standard anchusa, offering deep blue color and better garden performance. It's a cottage garden favorite that attracts pollinators and provides vertical interest to flower borders.
When should you plant Anchusa Dropmore Blue in your zone?
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Example Anchusa Dropmore Blue timeline · Pittsburgh, PA (Zone 6b)
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Plant Anchusa Dropmore Blue
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 Anchusa Dropmore Blue blooms
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Anchusa Dropmore Blue dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-8, exceptionally hardy for cold climates
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Seed/Germination
1-2 weeksTiny seedlings emerge within 7-14 days under light and consistent moisture
Do not cover seeds; provide bright light and 65-70°F temperatures. Keep soil moist but not waterlogged. Thin seedlings to proper spacing.
Vegetative Growth
4-6 weeksRosette of hairy, lance-shaped basal leaves develops; plant establishes deep taproot
Thin to final spacing (18 inches). Water moderately. Handle carefully to avoid damaging taproot. Staking may be needed for windy locations.
Flowering
6-10 weeks (June-August, extends with deadheading)Tall, branching stems emerge with dense racemes of vivid blue flowers
Deadhead spent flowers to encourage continuous blooming. Stake tall stems if needed. Divide crowded plants after flowering or in spring.
Seed Development
4-6 weeksIf left undeadheaded, flowers develop into nutlet seeds in spiky clusters
Allow some flowers to set seed for self-sowing next year, or deadhead to prevent aggressive seeding
Winter Dormancy
4-5 monthsFoliage dies back in fall; plant rests underground; roots persist to resprout in spring
No watering needed. Mulch in colder zones (3-4) for winter protection. Clean up dead foliage to prevent disease.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Hand-pick in early morning, use row covers on young plants, apply neem oil if severe
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Improve air circulation, avoid overhead watering, apply sulfur dust or neem oil at first sign
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Remove affected leaves, ensure good drainage and air flow, apply fungicide if severe
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and
Handpick at night, use beer traps, apply diatomaceous earth around base
Uses
Edible Flowers
CulinaryAnchusa flowers are edible with a mild, slightly sweet flavor. Use fresh petals as garnish for salads, desserts, or herbal tea for visual appeal and delicate taste. [source]
Traditional Herbal Remedy
MedicinalAnchusa has been used in traditional herbalism as a demulcent and expectorant for respiratory support. Historical uses include remedies for coughs and chest congestion, though modern clinical evidence is limited. [source]
Pollinator Support
WildlifeAnchusa Dropmore Blue is a premier nectar plant that attracts bees, butterflies, and hoverflies. Its abundant flowers provide essential forage during mid-to-late summer when other nectar sources decline. [source]
Cut Flower Arrangements
CraftThe tall, branching stems and vivid blue flowers make Dropmore Blue ideal for cottage-style and mixed border arrangements. Flowers last 7-10 days in a vase with regular water changes. [source]
Natural Dye Plant
HouseholdAnchusa roots historically provided a red/purple dye used in textiles and cosmetics. The pigment alkanet is extracted from the root and has been used as a natural colorant. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Cut fresh flowers for bouquets in early morning when stems are turgid. Harvest when first tier of flowers is open but upper buds still tight for longest vase life (7-10 days). Deadhead spent flower clusters to promote additional flushes of blooms throughout summer.
Fun Facts
- 🌱 The cultivar name 'Dropmore Blue' honors the Dropmore, Manitoba research station in Canada where this superior variety was developed for cold-climate gardening.
- 🌱 Anchusa has a deep taproot system that can reach 2-3 feet, making it extremely drought-tolerant once established but very difficult to transplant when mature.
- 🌱 The flowers are pollinator magnets—a single well-established plant can attract dozens of bees and butterflies on a warm summer day.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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