How to Grow Charles Joly Dahlia
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Charles Joly Dahlia
Dahlia × hybrida 'Charles Joly'
flowerCharles Joly is a striking decorative dahlia cultivar known for its deep burgundy-red, nearly black petals that create a dramatic, almost sinister appearance. This medium to large-flowered dahlia produces fully double blooms with perfectly arranged petals, making it a showstopper in gardens and floral arrangements. It's a favorite among dahlia enthusiasts for its unique dark coloring and reliable performance.
When should you plant Charles Joly Dahlia in your zone?
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Example Charles Joly Dahlia timeline · Pittsburgh, PA (Zone 6b)
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Plant Charles Joly Dahlia
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 Charles Joly Dahlia blooms
Around Jul 1≈ 75 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Charles Joly Dahlia dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 8-10; in cooler zones (5-7) grow as annuals or lift tubers in fall for winter storage
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Get my Charles Joly Dahlia timeline →Growth Stages
Tuber Sprouting
1-2 weeksDormant tubers begin showing sprouts and root development in warm soil (60°F+); initial shoots emerge from the crown.
Plant tubers in spring after last frost; keep soil warm and moist; protect from slugs and snails attracted to new growth
Vegetative Growth
4-6 weeksLeafy stems develop rapidly with compound foliage; plant reaches 2-4 feet in height; no buds yet visible.
Pinch central stem when 12-18 inches tall to encourage bushiness and more flowering stems; stake or cage for support; fertilize every 2-3 weeks with balanced formula
Budding & Flowering
8-12 weeks (extending to frost)Terminal flower buds form at stem tips; first blooms appear (typically by mid-to-late summer); deep burgundy-red decorative flowers fully double and nearly black in color.
Remove side buds to encourage larger exhibition blooms, or leave them for more numerous smaller flowers; deadhead spent blooms to encourage continuous flowering; maintain consistent water and fertilization with higher phosphorus (bloom-boosting formula)
Peak Bloom & Maintenance
6-8 weeks until frostAbundant decorative flowers in dark burgundy-red; plants reach full size; continuous blooming throughout fall.
Water deeply during dry spells; support heavy blooms with stakes; watch for spider mites and powdery mildew in late season; deadhead regularly; reduce nitrogen feeding to prevent excessive foliage at expense of flowers
Harvest & Dormancy
Through first frostBlooms continue until first frost (32°F); foliage blackens; tubers are ready for harvest or winter dormancy.
In zones 5-7, dig tubers after frost blackens foliage; cut stems to 2 inches; allow tubers to dry, then store in cool (50-55°F), dry location; in zones 8-10, may be left in ground with mulch protection or dug and stored
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to increase humidity; use neem oil or miticide in severe cases; remove heavily infested leaves
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Remove affected flowers; use yellow sticky traps; apply spinosad or neem oil if population is high
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and
(Gastropoda)
Handpick in early morning; use copper tape around planters; apply diatomaceous earth or organic slug bait; remove hiding places like dense foliage
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Spray with strong water spray; apply insecticidal soap or neem oil; encourage natural predators like ladybugs
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Handpick early morning (when beetles are sluggish); use pheromone traps away from plants; apply neem oil to foliage; avoid traps close to dahlias as they attract more beetles
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Improve air circulation with pruning; avoid overhead watering; apply sulfur or baking soda spray; remove severely affected leaves; ensure adequate spacing
Uses
Not typically edible
CulinaryWhile some dahlia species have edible tubers, Charles Joly is grown primarily as an ornamental flower and is not recommended for culinary use. [source]
Cut flowers & floral arrangements
HouseholdCharles Joly's dramatic deep burgundy-red blooms are prized by florists and arrangement designers for creating bold, sophisticated centerpieces, wedding arrangements, and autumn displays. The long vase life makes it excellent for cut flower gardens. [source]
Dried flowers & craft projects
CraftDahlia flowers can be dried for long-lasting arrangements, pressed flowers, or craft projects. The unique dark coloring of Charles Joly makes it particularly striking in dried arrangements and botanical art. [source]
Pollinator support
WildlifeDahlias attract bees, butterflies, and other beneficial pollinators to the garden. While double-flowered varieties like Charles Joly have reduced pollen accessibility compared to single forms, they still provide nectar resources for pollinators. [source]
Traditional herbal uses
MedicinalIn traditional medicine, some dahlia species have been used to support digestive health and as anti-inflammatory remedies, though scientific evidence is limited. Charles Joly is not typically used for medicinal purposes but represents the broader dahlia family's historical applications. [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 stems are fully hydrated; cut at a 45-degree angle just above a leaf node to encourage secondary blooms; remove lower leaves and place immediately in cool water with floral preservative; blooms last 7-10 days in a vase. For exhibition blooms, remove side buds 2-3 weeks before a show to allow single large, perfectly formed flower to develop.
Fun Facts
- 🌱 Charles Joly dahlias are named after the 'dark' or nearly black coloring of the petals—'Charles Joly' was bred to achieve this dramatic effect, making it one of the darkest dahlia cultivars available to home gardeners.
- 🌱 Dahlias are the national flower of Mexico and have been cultivated there for thousands of years. The tubers were used as a food source by Aztecs before dahlias became ornamental flowers in Europe.
- 🌱 Dahlia flowers are among the last to bloom in the garden, often flowering prolifically until the first hard freeze, making Charles Joly an excellent choice for extending garden color into late fall and early winter.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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