dianthus sweet william - Gardening Plants And Flowers
sweet william flower - Gardening Plants And Flowers

Dianthus Sweet William Seeds

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Dianthus Sweet William Mix is a perennial that can be grown as biennial and is winter hardy to USDA Zones 3-9. 

This colorful flower mix thrives in full sun or partial shade. The colors include: white, red, pink, crimson, scarlet, purple, and bi-colors. 

They will look great in flowerbeds, or as border edgings.

Dianthus make excellent cut flowers in addition to an amazing vase lifespan.



Plant Name: Dianthus Sweet William
Life Cycle: Perennial
USDA Zones: 3 - 9
Height: 18 - 24 inches
Bloom Season: Spring and summer
Bloom Color: Mix
Environment: Full sun
Soil Type: Well-drained, pH 6.0 - 7.2
Deer Resistant: Yes

Package includes: Dianthus Sweet William 500 Seeds


Temperature: 60 - 70F
Average Germ Time: 14 - 30 days
Light Required: Yes
Depth: 1/16 inch
Moisture: Keep seeds moist until germination
Plant Spacing: 12 inches


1. Planting Outdoors 

Direct sow is recommended, in the area you want them to grow - from late May until the beginning of August for blooming in the second year. 

Choose a sunny or partial shade place and remove the weeds.

Rake the soil to a fine tilth so that it's fine and easy breakable. The seed can be sown in drills 5mm deep and 12 inches (30cm) apart.

Water the soil before sowing and allow the drill to drain. Scatter the seed in thinly along the drill and cover up with soil. As they grow, if the plants are crowded, thin them out to 6 inches (15cm) apart.

Water well Dianthus - Sweet William during the hot, dry weather. Keep the soil moist to slightly dry. 

2. Planting Indoors

Start seed indoors 6-8 weeks before the potential last frost in your area for transplanting later. Young seedlings will transplant well into their home area for spring blooming. 

Scatter Sweet William Mix seeds over the starting mix and press them lightly into the growing medium.

Transplant into cell packs or small 3-4" containers, 20-25 days after sowing.

Harden off before transplanting outdoors, 6-8 weeks after sowing.

Cool temperatures of 50-55°F (10-13°C) will keep the plants low growing and basal branching. Avoid constant warm temperatures of 65°F (18°C), especially at night, which will produce soft growth. 


Processing time 2-5 business days.
Estimated delivery time 3-9 days (depending on your location).


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Dianthus Sweet William Seeds
Regular price
Sale price
Shipping calculated at checkout.
Regular price
Sale price
Shipping calculated at checkout.

Customer Reviews

Based on 10 reviews
Alexanne Ratke

.They are so beautiful and blooming like crazy.

Barton Bins

These seeds sprouted and performed as expected.

Elda Pouros

Quick germination.

Bonnie Goodwin

Mine hasn't really grown yet, but I remain optimistic. I will likely revise this review later.

Leonard Anderson

Germination rate very high.

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