Dianthus (Dianthus Barbatus Holborn Glory) - Old named varieties of Sweet William are becoming rare as the new hybrids are taking over; however, we are excited to be able to offer this heirloom Sweet William variety of Dianthus. Dianthus Barbatus Holborn Glory flower seed dates back to the 1920s. The flower trusses are a lovely combination of purple red and a pristine white ring bloom on straight, stiff stalks which easily grow from Dianthus seeds.

Cutting garden flower

This is one of the taller Dianthus plants, so it won't be used as a ground cover plant, but it's lovely in the cutting garden. Whether indoors or in back of ground cover plants, this is a wonderful Dianthus plant.

You simply won't believe the bloom size and color intensity of these flowers. The clusters reach 4 - 7 inches across, packed with fringed 3/4 inch blossoms so brilliant you won't be able to take your eyes off of them.

SOWING

Season: Biennial

Sow: February - August

Height: 18 - 24 inches

Bloom Season: June - July

Bloom Color: Purple-red w/ white ring

Environment: Full sun

Soil Type: Well-drained, pH 5.8 - 7.2

Deer Resistant: Yes

Germ temperature: 20C (68F) 

Average Germ Time: 7 - 14 days

Light Required: Yes

Depth: Seeds must be covered thinly

Moisture: Keep seeds moist until germination

Plant Spacing: 12 - 18 inches

How To Grow Dianthus From Seed: Sow Dianthus seeds indoors 4 - 6 weeks before last frost. Use sterile starter mix, and sow the Dianthus seeds on top, covering lightly with soil. Transplant seedlings outdoors after frost season has passed.

For directly sowing Dianthus seeds outdoors, wait until danger of frost is over, and directly sow the flower seed into prepared beds. Lightly cover and keep seeds moist. Expect them to last a long time in the garden even in the worst summer heat and up to 2 weeks in the vase if you prefer to enjoy this flower indoors.