Monarch® Blue Knight Butterfly Bush Flower Petal Close Up
This product does not ship to: AZ, CA, ID, MT, NV, OR, UT, WA

Monarch® Blue Knight Butterfly Bush

Plants That Work

$64.99
(No reviews yet) Write a Review
Availability : Out of Stock
$64.99
This product does not ship to: AZ, CA, ID, MT, NV, OR, UT, WA
  • Full Sun (At Least 6 Hours Of Direct Sunlight)
  • Mature Height 3 - 4 Feet
  • Mature Spread 3 - 4 Feet
  • Growing Zones 5 - 10

The Monarch® Blue Knight Butterfly Bush is a late bloomer, but it is worth waiting. Tiny, star-shaped, purplish-blue flowers bloom in large 10- to 12-inch panicles or clusters during the summer. A second flush of flowers will bloom during the fall. Also known as Buddleia, this plant features dense green and yellow leaves that stay in place throughout the growing season for consistent color.

This plant is a natural fit for a butterfly garden, but it also makes a lovely addition to beds, borders, or mass plantings. Plant it near other flowering plants or a vegetable garden to draw pollinators in or create a lovely flowering hedge. Trim the fragrant blooms to display in a vase. The Monarch® Blue Knight Butterfly Bush has a compact, rounded growth habit and grows as a perennial in USDA zones 5 through 10.

Monarch® Blue Knight Butterfly Bush Care

The ideal spot for this plant will receive full sun and have rich, moist soil that drains well. Water this beauty consistently for the first growing season, but established plants only need water weekly or when the top few inches of soil are dry. Feed the Monarch® Blue Knight Butterfly Bush with a balanced fertilizer when new growth emerges in the spring.

Deadhead this plant to extend the blooming period and encourage more flowers. Give the plant a trim during the late fall.

Monarch® Blue Knight Butterfly Bush Spacing

As an upright, branched plant, the Monarch® Blue Knight Butterfly Bush will grow 3 to 4 feet tall and 6 to 7 feet wide. Space plants 3 to 4 feet apart to create a hedge or continuous planting.

Monarch® Blue Knight Butterfly Bush Information

USDA Hardiness Zones: 5 - 10
Plant Type: Bushes
Light Exposure: Full Sun (At Least 6 Hours Of Direct Sunlight)
Mature Height: 3 - 4 Feet
Mature Spread: 6 - 7 Feet
Spacing: 6 - 7 Feet
Habit: Spreading, Upright
Flower Color(s): Blue, Purple
Flower Description:
Bloom Period:
Foliage Type: Deciduous
Foliage Color(s): Green
Foliage Description:
Seasonal Interest: Summer Flowering
Watering: Average
Resists: Deer
Tolerates: Drought
Attracts: Butterflies
Container Role:
Uses: Borders, Mass Planting, Wildlife Gardens
Features: Attracts Pollinators, Cut Flowers, Fragrant, Low Maintenance
Brand: Plants That Work
Common Name: Monarch® Blue Knight Butterfly Bush
Other Name(s):
Scientific Name: BUDDLEIA MONARCH `BLUE KNIGHT`
SKU:
1014275-pc

Container Sizes

Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on; type of plant, time of year, last pruning & many other factors.

4.5 Pot

4.5" Pot
 Also Know As:
   4.5" Container

 Plant Age:
   ~ 6 months
 Plant Size:
   ~ 3"-6"
 Pot Size:
   ~ 4.5"H x 3.75"W
 Volume:
   1.42 quarts

Quart Pot

Quart Pot
 Also Know As:
   Quart

 Plant Age:
   ~ 6 months - 1 year
 Plant Size:
   ~ 4"-8"
 Pot Size:
   ~ 4.75"H x 4.5"W
 Volume:
   1.50 quarts

2.5 Quart

2.5 Quart
 Also Know As:
   2.5 Quart Pot

 Plant Age:
   ~ 1.5 - 2 years old
 Plant Size:
   ~ 8"-12"
 Pot Size:
   ~ 6.5"H x 6.5"W
 Volume:
   2.20-2.30 quarts

#1 Pot

#1 Pot
 Also Know As:
   #1 Container
    1 Gallon
 Plant Age:
   ~ 1.5 - 2 years old
 Plant Size:
   ~ 10"-14"
 Pot Size:
   ~ 7"H x 7.75"W
 Volume:
   2.26-3.73 quarts

#2 Pot

#2 Pot
 Also Know As:
   #2 Container
    2 Gallon
 Plant Age:
   ~ 1.5 - 3 years old
 Plant Size:
   ~ 12"-18"
 Pot Size:
   ~ 9.5"H x 9.5"W
 Volume:
   1.19-1.76 gallons

#3 Pot

#3 Pot
 Also Know As:
   #3 Container
    3 Gallon
 Plant Age:
   ~ 2 - 4 years old
 Plant Size:
   ~ 12"-30"
 Pot Size:
   ~9.5"H x 11"W
 Volume:
   2.32-2.76 gallons


For more detailed information, please click here.

Plant Addict Guarantee (Included On All Plant Orders)

Plant Addicts guarantees your plant(s) will arrive happy and healthy, but the plant(s) are being shipped through the mail and accidents happen. If the plant is dead, has dried out roots or the incorrect item was shipped just notify Plant Addicts within 3 days upon delivery. We may ask for pictures but will try to make it as easy as possible for you. Please note plant(s) with damaged branches or wilted leaves will not qualify for this guarantee. Plants are very resilient and will rebound quickly when cared for correctly.

For information on how to care for you new plant please check out our guide. Guide: How to Care for Your New Plant(s)

Plant Addicts Warranty - 1 Year (Extra Purchase Required)

We encourage all plant lovers to purchase the Plant Addicts Warranty whether you’re new or an expert. There are many variables outside our control and yours that can cause the demise of your plant(s). Examples would be hungry animals, drought, poor soil conditions, over watering, disease, insects & many other factors. The Plant Addicts Warranty is a 1 year warranty protecting you from all the unknowns and will replace your plant if it moves on to the plant afterlife.

The warranty is purchased on a per plant basis and must be purchased at the same time as the plant purchase. We will cover 100% of the price of the plant but the warranty does not cover shipping cost. Simply let us know if your plant has died within one year of receiving it and we’ll get you a new one shipped out. We may ask for photos for documentation purposes but again we’ll try to make it as easy as possible.

For more information, please go to our Shipping & Returns page at the bottom of the website.

Guide: How to Care for Your New Plant(s)

Planter Shipping

Standard Colors: 2-3 business days

Special Order Colors: 8 weeks - this is due to the planter being custom made with the color(s) of your choice

Please Note: On special orders there can not be any cancellations

Plant Shipping

Time of Order:

Summer Shipping

  • If there is extreme heat we’ll delay shipping.  
    • We’ll have to review what areas the plants are traveling through along with your location


Once your plant is shipped you’ll receive an email with tracking information. Depending on the above criteria we’ll ship your plant(s) towards beginning of the following week from your order. We put together this helpful guide of what to do when you receive your plants in the mail.

It is important to know that all of our plants are clearly labeled for which growing zones the plant can survive in. The plants are thoroughly trialed and tested in every growing zone before we state the plant can grow in a zone. Again, our #1 priority is to ship the plants to you healthy and ready to thrive in your location. So we will do everything in our power to do so.