Sunflowers from seed

How to grow sunflowers from seed

Sunflowers are easy and fun to grow from seed - start yours off now.

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
At its best
At its best

Plant is not at its best in January

Plant is not at its best in February

Plant is not at its best in March

Plant is not at its best in April

Plant is not at its best in May

Plant is at its best in June

Plant is at its best in July

Plant is at its best in August

Plant is at its best in September

Plant is not at its best in October

Plant is not at its best in November

Plant is not at its best in December

To do
To do

Do not To do in January

Do not To do in February

Do To do in March

Do To do in April

Do To do in May

Do not To do in June

Do not To do in July

Do not To do in August

Do not To do in September

Do not To do in October

Do not To do in November

Do not To do in December

Easy and rewarding to raise from seed, with impressive, long-lasting flowers, the sunflower is an ideal plant for growing with children. Sunflowers look equally magnificent in borders or as cut flowers.

Sunflowers are hungry feeders. Improve the soil before planting out with plenty of well-rotted manure or garden compost. Water your sunflower plants regularly. You may also need to stake them if they’re in an exposed position.

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Discover how to grow sunflowers from seed, below.

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You Will Need

  • Sunflower seeds e.g. 'Russian Giant'
  • Multi-purpose compost
  • 7.5cm plastic pots
  • Plant labels
  • Pencil or waterproof pen
  • Watering can with rose attachment
  • Plastic bottles

Step 1

Use a good multipurpose compost to fill 7.5cm pots to 1cm below the rim. Tap each pot to settle the compost and firm gently.

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Step 2

Sow one seed per pot – sunflowers germinate reliably and form large seedlings. Poke the seed into the compost.

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Step 3

Cover the sunflower seed with about 1.5cm of compost. Label each pot and water well so that the compost is just moist throughout.

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Step 4

Cover each pot with a plastic bottle ‘cloche’ to keep seedlings warm. Plant your sunflowers outside in June when the last frosts are over.

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At the end of the flowering season, harvest seed from your sunflowers for culinary use. Remember, though, that seed from packets is not suitable for consumption.

Gardening gloves. Photo: Getty Images.