How to Grow Bishop of Llandaff
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Bishop of Llandaff
Dahlia 'Bishop of Llandaff'
flowerBishop of Llandaff is a stunning ornamental dahlia cultivar renowned for its deep burgundy-red semi-double flowers and striking dark purple-bronze foliage. This award-winning variety reaches 3-4 feet tall and blooms profusely from mid-summer through frost, making it a garden showstopper. The dramatic foliage combined with vibrant blooms creates exceptional visual impact in borders and containers.
When should you plant Bishop of Llandaff in your zone?
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Example Bishop of Llandaff timeline · Pittsburgh, PA (Zone 6b)
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Plant Bishop of Llandaff
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 Bishop of Llandaff blooms
Around Jun 26≈ 70 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Bishop of Llandaff dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 8-10; can be grown in zones 7 and cooler with winter tuber storage
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Get my Bishop of Llandaff timeline →Growth Stages
Tuber Dormancy & Sprouting
3-4 weeks after planting to first leaf emergenceTubers are stored or emerging from ground with small shoots visible at the eyes
Store tubers in cool, dry location (50-60°F) over winter. In spring, inspect for rot and plant after last frost date when soil reaches 60°F. Provide well-draining soil to prevent tuber rot.
Early Growth & Foliage Development
4-6 weeksDark purple-bronze leaves emerge and expand; stem lengthens; plant reaches 12-18 inches tall
Water regularly and consistently. Apply balanced fertilizer every 2-3 weeks. Pinch out the growing tip when plant reaches 12 inches tall to encourage bushier growth and more flowers. Provide sturdy support/staking as plant grows.
Bud Formation & Flowering Begins
4-5 weeksFlower buds form at branch tips; first semi-double burgundy-red blooms open; plant 2.5-3.5 feet tall
Switch to higher-potassium fertilizer to support blooming. Remove lower leaves as plant grows to improve air circulation. Deadhead spent flowers to encourage continuous blooming. Water at soil level to keep foliage dry.
Peak Bloom & Maintenance
8-12 weeks (until first frost)Abundant semi-double burgundy flowers with yellow centers; dark foliage at peak intensity; plant fully leafed out at mature height
Maintain consistent watering and fertilizing schedule. Deadhead regularly for maximum flower production. Monitor for pests and disease. Stake as needed for wind support. Enjoy cut flowers for arrangements.
Frost Decline & Dormancy
Variable; occurs after first frost in fallFirst frost blackens foliage; flowering stops; plant dies back to ground level
After first hard frost, cut back plant to 2-3 inches above ground. Dig up tubers carefully, cure in dry location for 1-2 weeks, then store in cool (50-60°F), dark, dry location until spring. Monitor for rot during storage.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray foliage with water to dislodge; use miticide if severe. Improve air circulation and humidity control.
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Remove affected flowers; use yellow sticky traps; apply insecticidal soap or neem oil if heavy infestation.
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Hand-pick in early morning; use pheromone traps away from plants; apply neem oil or spinosad if needed.
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Ensure good air circulation; avoid overhead watering; apply sulfur dust or fungicide at first sign of white coating.
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and
Remove debris and mulch that harbors them; use copper tape or diatomaceous earth barriers; hand-pick at dusk.
Uses
Ornamental garnishing
CulinaryDahlia flowers are edible with a mild, slightly sweet flavor and are sometimes used as sophisticated garnishes on gourmet desserts and salads. Both petals and inner flower structures can be used in high-end plating. [source]
Cut flowers and floral arrangements
CraftBishop of Llandaff is highly prized by florists and gardeners for its dramatic deep red semi-double blooms that last exceptionally well in vases. The flowers are excellent for wedding arrangements, special events, and long-stem bouquets. [source]
Ornamental garden focal point
HouseholdThe striking combination of dark burgundy flowers and purple-bronze foliage makes this dahlia an exceptional landscape specimen. It serves as a bold statement plant in borders, containers, and mixed gardens. [source]
Pollinator attraction
WildlifeDahlias attract bees, butterflies, and other pollinators throughout the bloom season. The semi-double flower form still offers accessible pollen and nectar, supporting pollinator populations in gardens. [source]
Traditional herbal use
MedicinalWhile not commonly used in modern herbalism, dahlias have roots in traditional Mexican medicine. Some cultures use dahlia extracts in preparations, though scientific evidence is limited. [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 flowers in early morning when fully open for longest vase life. Use sharp scissors and cut at a 45-degree angle. Remove lower leaves that would sit below waterline. Change vase water every 2-3 days. Cut flowers typically last 7-10 days. Deadhead spent blooms throughout the season to encourage continuous flowering.
Fun Facts
- 🌱 Bishop of Llandaff won the Royal Horticultural Society's prestigious Award of Garden Merit (AGM) and has been a garden favorite since its introduction, proving its enduring quality and performance.
- 🌱 The purple-bronze foliage of this cultivar is so striking that it's grown as much for its dramatic leaves as for its flowers—an uncommon distinction among dahlias that are typically chosen for blooms alone.
- 🌱 Dahlias were sacred to the Aztecs and called 'acocotli'; the modern Bishop of Llandaff represents centuries of breeding and selection, as dahlias have been cultivated for over 2,000 years.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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