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Sweet William, Mixed Colors Seeds

Dianthus barbatus
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Product Information Chevron Down Chevron Forward

This Sweet William variety features a mix of vivid colours.

The bright colors and spicy scent make this a garden standout. The biennial plants produce eye-catching bicolor blooms in combinations of red, pink, and white. Flower clusters grow to be as large as 15 cm (6”) across. This self-seeding variety is very pretty and easy to grow, blooming in its second year.


  • SKU: 140162
  • Common Name: Sweet William
  • Botanical Name: Dianthus barbatus
Growing Information Chevron Down Chevron Forward
Safe for bees
Safe
for Bees
Good for pollinators
Good For Pollinators
Grow best in
Grows
Best In:
Partial Shade
Days to germination
Days to
Germination:
5 - 10 days
Water needs
Water
Needs:
Light 2.5 (1 in / week)
Growing height
Growing Height:
30-45 cm (12-18")
Key Features Chevron Down Chevron Forward
  • Plant Type: Flower
  • Plant Lifecycle: Biennial
  • Fill Weight (grams): 350 mg
  • Approximate Seed Count: 250-275
  • Characteristics: Attracts bees, butterflies, hummingbirds, moths, and songbirds
  • Planting Method: Start Indoors
  • Color: Bicolors in combinations of red, pink and white
  • Water Needs: Light 2.5 (1 in / week)
  • Harvest/Bloom Season: June to July
  • Landscape Use: Border / Edge Planting
  • Resistance: Deer
Instructions Chevron Down Chevron Forward
    Growing Instructions:

    Sweet William seeds can be sown directly into the garden when the soil is warm and all danger of frost is passed. Soil temperature (not air temperature) should be warmer than 21°C (70°F) for seeds to germinate. Planting at a lower temperature will delay germination. Choose a location that receives at least 6 hours of sunlight daily. Space seeds and plant to the depth indicated below. Press seeds into the soil to ensure good contact and cover with 3 mm (1/8") of soil. After planting, water the seeds with a gentle mist or shower. A hard spray can wash soil away, dislodge seeds and clump them together. It is critical to keep the soil consistently moist, but not soggy during germination. Do not let the soil dry out, as young plants have underdeveloped roots and can quickly dehydrate, particularly in windy conditions. When your seedlings reach a height of a few centimetres (inches) and have developed 2 or 3 pairs of leaves, it is important to thin them out, according to the plant spacing indicated below to provide good air circulation and room to grow.

    For earlier blooms, seeds can be started indoors 6-8 weeks before the last frost in your area. Follow the seed depth and spacing guidelines indicated below. Once all danger of frost has passed, seedlings should be hardened off before planting in their growing location. Seedlings should be transplanted according to the plant spacing directions below. Regularly monitor your plants and ensure that the soil remains moist while they establish themselves in their new environment.

    Click here to read more information on planning and planting a garden.

  • Planting Depth: 3 mm (1/8")
  • Seed Spacing: 1.3 cm (1/2")
  • Plant Spacing: 20 cm (8")
  • Instructions for Nutrient Care: Feed plants SUPERthrive once per week. Mix 1.2 ml (1/4 tsp) per 4L (1 gallon) of water in a watering can and apply solution to the base of the plants.
Suggestions Chevron Down Chevron Forward
Growing Suggestions:
  • While Sweet William is classed as a biennial, it often reseeds itself in optimum growing conditions and remain in the garden.
  • Regularly removing spent flowers, known as deadheading will extend flowering and to maintain plant vigor.
  • While they can tolerate some light shade, excessive shade can lead to leggy, weak plants. In hot regions, a little afternoon shade can help extend the blooming period.
  • During the growing season, water Sweet William regularly, but avoid overwatering as it promotes fungal diseases.

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