How to Grow Delphinium

Delphiniums are best known for their tall striking columns of massed double and semi double perennial blooms. Often seen as a backdrop planting in cottage gardens, they provide a calming vibe to the garden with their rich shades of lavender, blue, pink and white with contrasting centres.

Full sun

Regular watering

Good drainage

Suitable for all climatic zones

How to grow delphiniums in a garden

Step 1

Choose a spot in the garden that receives full sun.

Step 2

Prepare the planting area well by digging in Yates Dynamic Lifter Soil Improver & Plant Fertiliser.

Step 3

Sow Delphiniums (Delphinium grandiflora) seeds directly where they are to grow and lightly cover with Yates Seed Raising Mix. Firm down and water well.

Step 4

After sowing cover with a sheet of newspaper or cardboard to limit the light to the seeds.

Step 5

Water gently and keep moist through germination period. After germination remove newspaper or cardboard.

Step 6

Once seedlings are approximately 5cm, mulch with an organic mulch, such as bark chips, sugar cane or pea straw.

Step 7

Feed every 1 to 2 weeks with Yates Thrive Roses and Flowers Liquid Plant Food.

How to grow delphiniums in a pot

Step 1

Choose a pot at least 200mm wide and deep. Position in full sun.

Step 2

Fill the chosen pots with quality potting mix, such as Yates Potting Mix with Dynamic Lifter.

Step 3

Plant directly into the pot by pressing the Delphiniums (Delphinium grandiflora) seeds lightly into the surface of the pot. Lightly cover with Yates Seed Raising Mix.

Step 4

After sowing cover with a sheet of newspaper or cardboard to limit the light to the seeds.

Step 5

Water gently and keep moist through germination period. After germination remove newspaper or cardboard.

Step 6

Feed every 1 to 2 weeks with Yates Thrive Roses and Flowers Liquid Plant Food.

Delphinium Pacific Giants

$3.30

Growing tips

Plants may require staking for support, ensure stakes are placed in position at planting time to avoid any root disturbances of the mature plants.
Remove spent flowers to encourage further blooms.
Delphiniums need darkness to germinate. Ensure that you place a piece of newspaper or cardboard over the seeds once planted and remove upon germination.