How to Grow Million Bells Kabloom
Wikimedia Commons
Million Bells Kabloom
Calibrachoa × hybrid 'Kabloom'
flowerMillion Bells Kabloom is a vibrant hybrid calibrachoa known for its prolific, small trumpet-shaped flowers that blanket the plant throughout the growing season. This compact, mounding variety produces hundreds of colorful blooms in shades of pink, red, purple, white, and bicolors with minimal deadheading required. It's an excellent choice for hanging baskets, containers, and garden borders.
Looking for a specific variety?
When should you plant Million Bells Kabloom in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Million Bells Kabloom timeline · Pittsburgh, PA (Zone 6b)
-
Plant Million Bells Kabloom
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
First Million Bells Kabloom blooms
Around May 17≈ 30 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Million Bells Kabloom dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Annual in zones 3-10; perennial in zones 11+. Best performance in zones 5-9.
Sign up free to see if Million Bells Kabloom grows in your zone — and get a personalized planting timeline.
Get my Million Bells Kabloom timeline →Growth Stages
Establishment
2-3 weeksYoung transplants with developing root systems and initial leaf formation
Water regularly to establish roots. Protect from strong wind. Provide bright light indoors or partial shade outdoors for first week. Begin light fertilizing after 2-3 weeks.
Vegetative Growth
3-4 weeksPlant develops compact, bushy form with expanding foliage; minimal flowering
Pinch back growing tips once or twice to encourage branching and fuller shape. Maintain consistent moisture and bright light. Apply balanced fertilizer every 1-2 weeks.
Flowering Initiation
1-2 weeksFirst flower buds appear; plant begins producing its characteristic abundant blooms
Continue regular watering and fertilizing. Shift to higher phosphorus fertilizer (bloom formula) to encourage flowering. Ensure 6+ hours of direct sun daily.
Peak Bloom
8-12 weeks (summer through fall)Plant covered with hundreds of small trumpet flowers in vibrant colors; dense, mounding appearance
Maintain consistent watering—critical during peak heat. Fertilize every 7-10 days with bloom formula. Deadheading is minimal but occasional removal of spent flower clusters improves appearance. Monitor for pests.
Decline/End of Season
Variable; until first hard frostFlowering slows as temperatures cool or frost approaches; plant gradually dies back in cold climates
Reduce watering and fertilizing as growth slows. In frost-free zones, plants may continue blooming through winter with adjusted care. Remove plant after frost in cold climates.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Spray with insecticidal soap or neem oil every 7 days. Remove heavily infested leaves. Encourage natural predators like lacewings. Avoid excessive nitrogen fertilizer.
-
Increase humidity by misting foliage. Spray with water to dislodge mites. Apply miticide or neem oil if severe. Ensure adequate watering to reduce plant stress.
-
Spray with strong water stream to remove. Use insecticidal soap or horticultural oil. Apply neem oil for persistent infestations.
-
Allow soil surface to dry between waterings. Use yellow sticky traps. Apply diatomaceous earth to soil surface. Use soil drench with beneficial nematodes if severe.
-
Improve air circulation. Avoid wetting foliage. Apply sulfur dust or fungicide at first sign. Remove heavily affected leaves.
Uses
Not for consumption
CulinaryMillion Bells Kabloom is toxic if ingested and not used for food or beverage preparation. [source]
Container and basket gardening
HouseholdExceptionally popular for hanging baskets, window boxes, container combinations, and as a mounding border plant. Its compact, spreading habit and abundant blooms make it ideal for mass plantings and mixed containers. [source]
Pollinator attraction
WildlifeSmall trumpet flowers attract butterflies, bees, and other beneficial insects, providing nectar throughout the growing season. [source]
Floral arrangements and garden design
CraftUsed as trailing accents in mixed containers, tropical-style arrangements, and as colorful groundcover in decorative garden designs. The profusion of blooms adds texture and movement to garden displays. [source]
Harvest Tips
Million Bells Kabloom is grown for continuous ornamental blooms rather than harvest. Deadheading (removing spent flowers) is optional as the plant sheds faded blooms naturally. Pinching back stems early in the season encourages bushier growth and more flowers. For propagation, take 2-3 inch cuttings in spring or summer and root in moist potting mix under humidity.
Fun Facts
- 🌱 Million Bells Kabloom is part of the Proven Winners line and was specifically bred for its exceptional heat tolerance and disease resistance, making it reliable even in challenging summer conditions.
- 🌱 The 'Kabloom' name reflects the plant's tendency to explode with flowers—a single plant can produce over 1,000 blooms throughout the season with proper care.
- 🌱 Calibrachoa is closely related to Petunia but produces smaller, more delicate flowers and typically requires less deadheading, making it lower-maintenance for container gardeners.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Million Bells Kabloom planting timeline
Tell us your zip code and we'll calculate exactly when to start Million Bells Kabloom seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Million Bells Kabloom timeline →