Dahlia Seeds

Dahlias are back in fashion, and the great news is they are easily raised from seed and will flower in their first summer after sowing. With their wide range of colours and shapes they are very versatile, looking fabulous in beds, borders and containers, they also make a beautiful cut flower display.

They have an extremely long flowering period, blooming until the first hard autumn frost, by which time they will have developed tubers. These can easily be lifted, stored frost-free and re-planted the following spring – making them great value for money!

How to Sow and Grow Dahlias
Sow indoors, February to April, in trays of seed compost, at a depth of 0.5cm(1/4in). Water well and keep at 15-20°C(60-68°F), a warm kitchen windowsill is usually fine. Transplant seedlings when large enough to handle, 5cm(2in) apart in trays or into small individual pots. Gradually acclimatise to outside conditions and plant out after the last frost has passed. Space plants 30-45cm(12-18in) apart (depending on the variety) in a well-drained and sunny position. Pinch out the growing tip to stimulate branching.

Dahlias thrive on regular feeds and it helps to dig organic matter into the soil before planting out. Apply a general-purpose fertiliser as plants get established and then a liquid feed every 2 weeks to boost flowering - A tomato feed will give good results!

During hot spells aim to soak the roots really well once a week. Taller dahlias need staking so place canes at each corner of the plant and weave string in a web ensuring the plant can grow through it. Deadhead regularly to encourage more flowers.

Dahlias are back in fashion, and the great news is they are easily raised from seed and will flower in their first summer after sowing. With their wide range of colours and shapes they are very versatile, looking fabulous in beds, borders and containers, they also make a beautiful cut flower display.

They have an extremely long flowering period, blooming until the first hard autumn frost, by which time they will have developed tubers. These can easily be lifted, stored frost-free and re-planted the following spring – making them great value for money!

How to Sow and Grow Dahlias
Sow indoors, February to April, in trays of seed compost, at a depth of 0.5cm(1/4in). Water well and keep at 15-20°C(60-68°F), a warm kitchen windowsill is usually fine. Transplant seedlings when large enough to handle, 5cm(2in) apart in trays or into small individual pots. Gradually acclimatise to outside conditions and plant out after the last frost has passed. Space plants 30-45cm(12-18in) apart (depending on the variety) in a well-drained and sunny position. Pinch out the growing tip to stimulate branching.

Dahlias thrive on regular feeds and it helps to dig organic matter into the soil before planting out. Apply a general-purpose fertiliser as plants get established and then a liquid feed every 2 weeks to boost flowering - A tomato feed will give good results!

During hot spells aim to soak the roots really well once a week. Taller dahlias need staking so place canes at each corner of the plant and weave string in a web ensuring the plant can grow through it. Deadhead regularly to encourage more flowers.

11 products

Tall and long lasting
50 Seeds
£2.40
Item Code: 14600
Loved by butterflies & bees
50 Seeds
£2.40
Item Code: 14334
Long flowering, great colours
40 Seeds
£2.40
Item Code: 14716
Long-lasting summer displays
50 Seeds
£2.40
Item Code: 16317
Dramatic, simple flowers
40 Seeds
£2.80
Item Code: 13010
40 Seeds
£2.95
Item Code: 27951
Huge, very uniform blooms
40 Seeds
£2.45
Item Code: 13412
A superb dwarf variety
40 Seeds
£2.25
Item Code: 11621
Excellent border plant
40 Seeds
£2.25
Item Code: 20430
Perfect variety for cutting
40 Seeds
£2.25
Item Code: 10630
50 Seeds
£2.25
Item Code: 23799