Ageratum Bumble Blue, also known as Ageratum Houstonianum or Floss Flower, is an annual native to Mexico. Westhoff developed this Ageratum hybrid to offer superior flowering and uniform growth. Bumble Blue flourishes in full sun with an upright mounding habit of 8-12 inches. Floss Flower's blue blooms attract butterflies, bees, and hummingbirds from May through September. Ageratum makes beautiful containers and borders. Combine Bumble Blue with Salvia, Vinca, Angelonia, Begonia, Marigold, and Petunia to create a welcoming landscape.
Bumble Blue Selling Tips
Sell Ageratum Bumble to any customer looking for a low-maintenance annual to add to a container or landscape border. Floss Flower succeeds in full sun with plenty of heat and is outstandingly vigorous. Flowers bloom continuously from spring through fall with no deadheading. Even in high temperatures, this plant requires little more than moderate water. Ageratum Bumble provides ornamental interest without adding to your customer's gardening maintenance. Bumble Blue brings pollinators to the garden as well. Combine Ageratum Bumble Blue with Rose, Silver, or White to add depth and variety to containers.
Coach Your Customer
1. Space plants 12-14" apart in well-drained soil in full sun.
2. Water regularly, but don't allow standing water or soil to dry out, especially in containers.
3. Remove plants from the garden after the first frost.
General Growing Tips For Your Rooted Cutting Liner
For best results with Ageratum Bumble, use well-drained soil in full sun with medium feed (150-200 ppm), a pH of 6.0-6.5, and an EC of .6-.9. Plant one rooted liner per 4-inch container or two to three plugs per 10-inch pot. Maintain daytime temperatures of 70-80 degrees and nighttime temperatures of 58-62 degrees during finishing. You may see aphids or whiteflies. This plant can be susceptible to powdery mildew.
Flowering
Blue flowers bloom from spring through fall.
Pinching
Pinch once after transplanting.
Spacing
Space containers 6-8" apart for adequate ventilation.
Height Control
Bumble Blue doesn't require chemical growth regulators.
Pests
You may see aphids or whiteflies.
Disease
Ageratum Bumble can be susceptible to powdery mildew, especially during humid nights and cool days. Take these preventative steps to protect your plants:
1. Water plants in the morning at the base to allow them to dry out by nighttime.
2. Provide adequate ventilation by spacing plants and use horizontal airflow fans to increase airflow.
3. Grow plants in full sun.
Planting Bumble Blue Liners
We recommend planting one liner per 4-inch container or two-three liners per 10-inch container. Use well-drained soil and completely bury the ellepot centered or equally spaced in your pot.
Rooted Cuttings
Cuttings vary in size between different plant families. These rooted starter plants will arrive ready to be transplanted in to your final container. If they are to be used in a landscape application, you will need to establish them in a 4 inch pot or an 1801 before planting outside.
Ageratum Bumble Blue Quick Reference Guide
4 Inch crop time
4-6 Weeks
10 Inch crop time
10-12 Weeks
Bloom Period
Fall, Summer, Spring
Color
Blue, Purple
Habit
Upright, Mounding
Height
8-12 Inches
Light
Full Sun
Minimum Temp
58
Perennial Zone
-
Water Needs
Moderate
Patented Plant
Yes
Current
Availability
Current Availability
05-11-2026 (Week 20)
0
05-18-2026 (Week 21)
0
05-25-2026 (Week 22)
0
06-01-2026 (Week 23)
0
06-08-2026 (Week 24)
400
06-15-2026 (Week 25)
900
06-22-2026 (Week 26)
900
06-29-2026 (Week 27)
900
07-06-2026 (Week 28)
700
07-13-2026 (Week 29)
500
07-20-2026 (Week 30)
0
07-27-2026 (Week 31)
0
08-03-2026 (Week 32)
0
08-10-2026 (Week 33)
0
08-17-2026 (Week 34)
0
08-24-2026 (Week 35)
0
08-31-2026 (Week 36)
0
09-07-2026 (Week 37)
0
09-14-2026 (Week 38)
0
09-21-2026 (Week 39)
0
09-28-2026 (Week 40)
0
10-05-2026 (Week 41)
0
10-12-2026 (Week 42)
0
10-19-2026 (Week 43)
700
10-26-2026 (Week 44)
700
11-02-2026 (Week 45)
700
11-09-2026 (Week 46)
1,900
11-16-2026 (Week 47)
2,100
11-23-2026 (Week 48)
2,300
11-30-2026 (Week 49)
3,600
12-07-2026 (Week 50)
3,900
12-14-2026 (Week 51)
4,100
12-21-2026 (Week 52)
5,000
12-28-2026 (Week 53)
5,400
01-04-2027 (Week 01)
5,400
01-11-2027 (Week 02)
6,600
01-18-2027 (Week 03)
1,800
01-25-2027 (Week 04)
6,600
02-01-2027 (Week 05)
6,600
02-08-2027 (Week 06)
4,700
Ageratum Bumble Blue, also known as Ageratum Houstonianum or Floss Flower, is an annual native to Mexico. Westhoff developed this Ageratum hybrid to offer superior flowering and uniform growth. Bumble Blue flourishes in full sun with an upright mounding habit of 8-12 inches. Floss Flower's blue blooms attract butterflies, bees, and hummingbirds from May through September. Ageratum makes beautiful containers and borders. Combine Bumble Blue with Salvia, Vinca, Angelonia, Begonia, Marigold, and Petunia to create a welcoming landscape.
Bumble Blue Selling Tips
Sell Ageratum Bumble to any customer looking for a low-maintenance annual to add to a container or landscape border. Floss Flower succeeds in full sun with plenty of heat and is outstandingly vigorous. Flowers bloom continuously from spring through fall with no deadheading. Even in high temperatures, this plant requires little more than moderate water. Ageratum Bumble provides ornamental interest without adding to your customer's gardening maintenance. Bumble Blue brings pollinators to the garden as well. Combine Ageratum Bumble Blue with Rose, Silver, or White to add depth and variety to containers.
Coach Your Customer
1. Space plants 12-14" apart in well-drained soil in full sun.
2. Water regularly, but don't allow standing water or soil to dry out, especially in containers.
3. Remove plants from the garden after the first frost.
General Growing Tips For Your Rooted Cutting Liner
For best results with Ageratum Bumble, use well-drained soil in full sun with medium feed (150-200 ppm), a pH of 6.0-6.5, and an EC of .6-.9. Plant one rooted liner per 4-inch container or two to three plugs per 10-inch pot. Maintain daytime temperatures of 70-80 degrees and nighttime temperatures of 58-62 degrees during finishing. You may see aphids or whiteflies. This plant can be susceptible to powdery mildew.
Flowering
Blue flowers bloom from spring through fall.
Pinching
Pinch once after transplanting.
Spacing
Space containers 6-8" apart for adequate ventilation.
Height Control
Bumble Blue doesn't require chemical growth regulators.
Pests
You may see aphids or whiteflies.
Disease
Ageratum Bumble can be susceptible to powdery mildew, especially during humid nights and cool days. Take these preventative steps to protect your plants:
1. Water plants in the morning at the base to allow them to dry out by nighttime.
2. Provide adequate ventilation by spacing plants and use horizontal airflow fans to increase airflow.
3. Grow plants in full sun.
Planting Bumble Blue Liners
We recommend planting one liner per 4-inch container or two-three liners per 10-inch container. Use well-drained soil and completely bury the ellepot centered or equally spaced in your pot.
Rooted Cuttings
Cuttings vary in size between different plant families. These rooted starter plants will arrive ready to be transplanted in to your final container. If they are to be used in a landscape application, you will need to establish them in a 4 inch pot or an 1801 before planting outside.
Ageratum Bumble Blue Quick Reference Guide
4 Inch crop time
4-6 Weeks
10 Inch crop time
10-12 Weeks
Bloom Period
Fall, Summer, Spring
Color
Blue, Purple
Habit
Upright, Mounding
Height
8-12 Inches
Light
Full Sun
Minimum Temp
58
Perennial Zone
-
Water Needs
Moderate
Patented Plant
Yes
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