How to Grow Dahlia Bluesette
Dahlia Bluesette
Dahlia × hybridus 'Bluesette'
flowerDahlia Bluesette is a charming dwarf decorative dahlia cultivar known for its stunning lavender-blue flowers with delicate petal formations. This compact variety reaches only 12-18 inches tall, making it ideal for borders, containers, and small garden spaces. The blooms appear continuously throughout the growing season with proper deadheading.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-9; can be grown in 3-4 with winter protection or annual replanting
Sign up to see your zone highlighted.
Growth Stages
Tuber Dormancy & Sprouting
2-4 weeks indoors, or 2-3 weeks after direct plantingDahlia tubers are started indoors 4-6 weeks before last frost or directly planted outside after frost danger passes. Eyes (growth buds) begin sprouting into stems.
Start indoors in moist potting mix to encourage sprouting; keep at 65-70°F. Ensure tubers are disease-free and stored properly over winter in cool, dry conditions.
Vegetative Growth
4-6 weeksStems and foliage develop rapidly. The plant produces bushy, compact growth with feathery green leaves characteristic of dahlias.
Pinch main stem when 6-8 inches tall to encourage branching; remove lower leaves to improve air circulation. Water consistently and provide balanced fertilizer every 2-3 weeks. Support with stakes if needed.
Bud Formation
2-3 weeksFlower buds appear in leaf axils and at branch tips. Buds are small and tight, showing the characteristic lavender-blue coloration beginning to emerge.
Continue regular watering and fertilizing with slightly higher phosphorus to encourage flowering. Ensure adequate spacing for air circulation to prevent powdery mildew.
Flowering
8-12 weeks or until first frostFully formed lavender-blue flowers with decorative petal formations bloom abundantly. Flowers are medium-sized (3-4 inches across), semi-double to double in form.
Deadhead spent blooms regularly to promote continuous flowering throughout season. Water at soil level, avoiding foliage. Continue light fertilizing every 3-4 weeks. Watch for pests and diseases.
Senescence & Frost
Variable; typically October-November in northern zonesAs temperatures drop below 50°F (10°C) or frost occurs, foliage blackens and the plant dies back. Tubers harden and enter dormancy underground.
After first frost, cut back stems to 4-6 inches. In zones 3-8, dig tubers, clean off soil, dry for 2-3 weeks, and store in cool (45-50°F), dry location. In zones 9-10, may overwinter in ground.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Spray with water to dislodge; use neem oil or insecticidal soap in early morning or evening; improve humidity; check undersides of leaves
-
Improve air circulation by removing lower leaves and spacing plants; apply sulfur fungicide or neem oil; water at soil level; avoid wetting foliage
-
Hand-pick in early morning; place sticky traps around base; use insecticidal soap; remove dead plant matter and debris
-
Use reflective mulches; apply neem oil or spinosad; remove heavily infested blooms; encourage beneficial insects
-
and
Hand-pick at dusk; create barriers with copper tape or diatomaceous earth; reduce mulch depth near base; use beer traps
-
Hand-pick; use yellow sticky traps; apply pyrethrin-based insecticides; remove and destroy heavily infested plants
Uses
Edible flowers
CulinaryDahlia Bluesette petals are edible and can be used as garnish for salads, desserts, and cocktails, adding a delicate lavender aesthetic and mild flavor. Use only flowers grown without pesticides. [source]
Cut flower arrangements
HouseholdThe long stems and continuously blooming nature make Dahlia Bluesette ideal for fresh flower arrangements, cottage garden displays, and floral design. Flowers hold their shape and color well in arrangements. [source]
Pollinator attraction
WildlifeThe abundant blooms attract bees, butterflies, and other pollinators, making it an excellent choice for supporting beneficial insect populations in gardens. [source]
Flower pressing & drying
CraftThe structured petals of Dahlia Bluesette dry well for pressed flower crafts, dried arrangements, and botanical art projects. Flowers can be air-dried upside down in bundles. [source]
Traditional herbal use
MedicinalIn traditional medicine, dahlia tubers and flowers have been used in some cultures for their potential anti-inflammatory properties, though scientific research 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 or late evening when stems are fully hydrated. Cut just above a leaf node at 45-degree angle. Remove lower foliage below the water line. Change water every 2-3 days. Dahlias last 5-7 days in a vase. Deadhead spent blooms regularly throughout the season to encourage continuous flowering until frost.
Fun Facts
- 🌱 Dahlia Bluesette's lavender-blue coloring is relatively rare among dahlias; true blue dahlias have been a breeding goal for decades, with Bluesette being one of the closest approximations to blue in dahlia genetics.
- 🌱 Dahlias are native to Mexico and were considered sacred by the Aztecs, who used them for food, ceremonies, and as a symbol of elegance and dignity. The flower was named after botanist Anders Dahl.
- 🌱 A single dahlia plant can produce over 100 flowers in a season with proper deadheading, and the more you cut them for arrangements, the more blooms it produces due to the plant's natural response to encourage seed production.
Want personalized planting timelines?
Sign up to get frost dates, task lists, and more for your zone.
Get started free