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Phlox, Blue Paradise

Buy Any 3 Perennial Plants or Bulbs & Save 20%

Short Description

The best blue phlox available!

Full Description

The absolute standard to compare all others for mildew-resistance, Blue Paradise rewards you with loads of true-blue flower heads all summer. The choice for creating a sea of calming color in the back border.
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Item#: 20574
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Phlox, Blue Paradise
Phlox, Blue Paradise, , large
Item #: 20574
1 Plant
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Product properties

Zone This refers to the USDA hardiness zone assigned to each part of the country, based on the minimum winter temperature that a region typically experiences. Hardiness zone ranges are provided for all perennial plants and you should always choose plants that fall within your range.


Sun The amount of sunlight this product needs daily in order to perform well in the garden. Full sun means 6 hours of direct sun per day; partial sun means 2-4 hours of direct sun per day; shade means little or no direct sun.

Full Sun, Part Sun

Height The typical height of this product at maturity.

36-40 inches

Spread The width of the plant at maturity.

24-30 inches

Bloom Season The time of the year when this product normally blooms.

Fall, Summer

Resistant To Adverse garden conditions, such as heat or frost, deer or rabbits, that this product can tolerate well.


Plant Shipping Information

Plants begin shipping on:

Sep 12, 2016

(Click here for fall shipping schedule)


Item 20574 cannot ship to: AA, AE, AK, AP, AS, CN, FM, GU, HI, MH, MP, PR, PW, VI
See all Burpee plant shipping restrictions for your state

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Introduction to Perennials
Perennials return year after year blooming on their own. Watch this introduction and discover how easy and rewarding growing perennials can be.
Watch video
Perennials Tour #1
Take a garden tour and see favorite perennial plants in a garden setting. In this video- Shasta Daisy, Ornamental Grass, Butterfly Bush, Echinacea and Hydrangea.
Watch video

Phlox: Bare Root or Potted Plant Perennial

How to Plant

Planting Bare Root Plants:

  • Select a location in full sun with a well amended soil that is evenly moist. Make sure there is good air circulation.
  • Prepare the bed by turning the soil under to a depth of 6-12, inches removing any debris, and lightly raking as level as possible.
  • The addition of organic matter (leaf mold, compost, well-rotted manure) benefits all gardens and is essential in recently constructed neighborhoods.
  • Dig a hole deep and wide enough to accommodate the bare root.
  • Set the plant such that the crown is at or just slightly below the ground level. Allow roots to fan out from the crown at around a 45 degree angle. Roots should spread out separately, like stretched fingers, from the crown, and not bunch up. It may be helpful to build a cone-shaped mound of soil in the bottom of the hole and spread the roots around it. It is important to set the roots such that the crown is roughly level with the ground.
  • Cover the roots with soil and tamp down firmly to get rid of air pockets. Fill the soil to just below the crown, where the top growth and leaves will emerge. Make sure all the roots under the crown are in good contact with the soil.
  • Water well to fully saturate the roots and soil.
  • Wait until new growth starts to appear before applying a layer of mulch.

Planting Potted Plants:

  • Select a location in full sun with a well amended soil that is evenly moist. Make sure there is good air circulation.
  • Prepare the bed by turning the soil under to a depth of 6-12, inches removing any debris, and lightly raking as level as possible.
  • The addition of organic matter (leaf mold, compost, well-rotted manure) benefits all gardens and is essential in recently constructed neighborhoods.
  • Plant on a cloudy day or in late afternoon to reduce transplant shock.
  • Dig a hole for each plant large enough to amply accommodate the root ball.
  • Unpot the plant and gently loosen the root ball with your hands to encourage good root growth.
  • Place the top of the root ball even with the level of the surrounding soil. Fill with soil to the top of the root ball. Press soil down firmly with your hand.
  • Use the plant tag as a location marker.
  • Thoroughly water and apply a light mulch layer on top of the soil (1-2 inches) to conserve water and reduce weeds.

How to Grow

  • Keep weeds under control during the growing season. Weeds compete with plants for water, space and nutrients, so control them by either cultivating often or use a mulch to prevent their germination.
  • Mulches also help retain soil moisture and maintain even soil temperatures. For perennials, an organic mulch of aged bark or shredded leaves lends a natural look to the bed and will improve the soil as it breaks down in time.  Always keep mulches off a plant’s stems to prevent possible rot.
  • Careful watering is essential in getting perennials off to a good start. Water thoroughly at least once a week to help new roots grow down deeply. Soil should be damp at about 1 inch below the soil surface. You can check this by sticking your finger in the soil. Water early in the morning to give all leaves enough time to dry. One inch of rain or watering per week is recommended for most perennial plants. You can check to see if you need to add water by using a rain gauge.
  • Until plants become established, some protection from extreme winds and direct, hot sunlight may be necessary. Good air movement is also important.
  • After new growth appears, a light fertilizer may be applied. Keep granular fertilizers away from the plant crown and foliage to avoid burn injury. Use low rates of a slow release fertilizer such as Garden-tone, as higher rates may encourage root rots.
  • “Deadhead”, remove spent flower heads to encourage continuous flowering and prevent seed development.
  • Remove and discard foliage after a hard frost in fall.
  • In colder regions, apply another layer of mulch (1-2 inches) after the ground freezes in fall. Evergreen boughs (from Christmas trees) provide additional protection. Remove this mulch in the spring.
  • Divide in spring every three to four years to avoid overcrowding.
  • Plants may need staking; stake entire plant up to the flowers.

Growing Tips

  • To control height, delay bloom and increase the number of blooms, pinch plants back by ½ of their height in late spring/early summer.
  • Many gardeners do not cut back perennial flower seed heads in the fall, but wait until early spring before the new foliage appears. This provides food for wildlife over the winter.
  • Avoid overhead watering and divide clumps before plants get overly crowded.
  • Plants are intolerant of dry spells.
  • Harvest phlox flowers when 1/3-1/2 of the flowers in the panicles are open.
Full Sun, Part Sun
36-40 inches
24-30 inches
Bloom Season
Fall, Summer
Resistant To
Ornamental Use
Beds, Borders, Cut Flowers
Planting Time
Fall, Spring
Life Cycle
Phlox, Blue Paradise is rated 4.0 out of 5 by 2.
Rated 3 out of 5 by from Not Blue The first plant I ordered arrived broken of right at the soil and I was sent another. The stub of the broken plant miraculously grew back eventually. They are very pretty, but flop over when heavy with blooms. The color is more of a bright magenta.
Date published: 2012-09-10
Rated 5 out of 5 by from Outstanding color I ordered Blue Paradise with David phlox this year. When the plants arrived, I noticed that the Blue Paradise stems were darker with an almost deep maroon streak going through them and the leaves were a darker green so I could tell the difference between David and Blue Paradise even without reading the labels. The Blue Paradise is less vigorous than David (stems are weaker, plants are a bit shorter) but they bloomed first in a part shade bed. I am giving it 5 stars for the color which is deep and bold - it is more of a dark violet and not necessarily blue. It goes wonderfully well with pinks like Shortwood phlox.
Date published: 2007-08-10
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