Phlox Drummondii 21st Century Blue Flower Seeds

Phlox Seeds - 21st Century Blue

Flower Specifications

Season: Annual

USDA Zones: 3 - 10

Height: 10 inches

Bloom Season: Early Spring until Frost

Bloom Color: Purple

Environment: Full sun

Soil Type: Well-drained, sandy, pH 6.1 - 7.3

Deer Resistant: Yes

Latin Name: Phlox Drummondii

Planting Directions

Temperature: 65 - 70F

Average Germ Time: 7 - 21 days

Light Required: No

Depth: 1/16th inch

Sowing Rate: 3 - 4 seeds per plant

Moisture: Keep seeds moist until germination

Plant Spacing: 10 - 12 inches

Blue Phlox (Phlox Drummondii 21st Century Blue) - Cool season plant is perfect for landscapes and mixed containers.  This full sun plant only grows 10 inches tall and blooms from early Spring up until frost in this purplish color.  Attracts bees and butterflies making it the perfect low growing pollinator.

Sow Phlox flower seeds directly outdoors into prepared soil in the late fall or spring. After distributing the flower seed evenly, rake into loosened topsoil to ensure good seed contact with the soil. For earlier blooms, sow the Drummond Phlox seed indoors 4 - 6 weeks before setting out. As with all annual flowers, it is essential that annual Phlox Drummondii is allowed to re-seed for an abundant display the following year. Annual Phlox care includes trimming the plant back after the first flush of blooms. A trim encourages a second bloom of Phlox flowers.

Beautiful In The Garden!

When it comes to Phlox flowers, many gardeners often agree with Karl Foerster, a horticulturist. He said that "a garden without a phlox is a mistake."

Beautiful In The Garden!

Phlox Seeds | 21st Century Blue

How to Grow

Sow Phlox flower seeds directly outdoors into prepared soil in the late fall or spring. After distributing the flower seed evenly, rake into loosened topsoil to ensure good seed contact with the soil. For earlier blooms, sow the Drummond Phlox seed indoors 4 - 6 weeks before setting out.

  • Sowing Rate: 3 - 4 seeds per plant
  • Depth: 1/16th inch
  • Moisture: Keep seeds moist until germination
  • Average Germ Time: 7 - 21 days
Phlox Seeds | 21st Century Blue

Flower Specifications

As with all annual flowers, it is essential that annual Phlox Drummondii is allowed to re-seed for an abundant display the following year.

  • Plant Spacing: 10 - 12 inches
  • Height: 10 inches
  • USDA Zones: 3 - 10
  • Season: Annual