Dahlias (Dahlia cvs) are a summer favourite for bringing beautiful bold perennial flowers into the garden. They come in a gorgeous range of colours from whites, buttery cream, yellow and salmon through to bright pink and rich red. Dahlias also come in a range of shapes - from pompons, anemones, cactus, single and collarette. Dahlias can be easily grown from seed, tubers, bulbs or corms.


How to grow Dahlias in a garden

Starting from a seedling or potted plant:

  1. Choose a position in full sun with well-drained soil.
  2. Enrich the soil with Yates Thrive Natural Blood & Bone with Seaweed.
  3. When planting into prepared garden bed, ensure seedlings/plants are well spaced – at least 20 to 30cm apart.
  4. Dig the planting hole twice as wide and to the same depth as the root-ball. Remove the plant from the container. Position in hole and backfill, gently firming down. Form a raised ring around the plant, creating a well so that water will go where it’s needed most. Water in well.
  5. Water in gently and keep soil moderately moist at all times.
  6. Mulch with an organic mulch such as bark chips, woodchip or pea straw to a depth of 5 - 8cm, keeping it away from the base of the plant.
  7. Feed with Yates Thrive Rose & Flower Granular Plant Food. TIP: for an added boost, apply Yates Thrive Roses & Flowers Liquid Plant Food.

Starting from seed:

  • Fill starter pots or trays with Yates Black Magic Seed Raising Mix. Sow seeds, lightly cover with mix, firm down and gently water in well. Keep moist at all times and place in a warm and sheltered position until seedlings have grown to 5 cm tall, then plant into the garden.
  • Alternatively, sow direct where they are to grow in rows or in scattered clumps around the garden. Cover with a 12mm layer of Yates Black Magic Seed Raising Mix. Lightly firm down and keep moist. Just be sure to enrich the soil with Yates Thrive Natural Blood & Bone with Seaweed prior to sowing.

Starting from tubers:

  • Once the weather warms up, stored tubers will start to form eyes or shoots. Once these start to form, the tubers are ready to plant out.
  • Plant them whole with the growing eyes or shoots facing up. When planting make sure that the root end of the tuber is covered by at least 10 cm of soil. Just be sure to enrich the soil with Yates Thrive Natural Blood & Bone with Seaweed prior to planting.
  • Once planted, do not water the tubers right away as this could encourage rot. It is best to wait until the sprouts have appeared above the soil to water.
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How to grow Dahlias in a pot

Starting from a seedling or a potted plant:

  1. Choose a pot at least 200mm wide with adequate drainage holes.
  2. Position pot in full sun.
  3. Fill the pot with a quality potting mix such as Yates Premium Potting Mix.
  4. Remove the plant/tuber from the container. Position in hole and backfill, gently firming down.
  5. Water in gently and keep mix moderately moist at all times.
  6. Feed with Yates Thrive Roses & Flowers Liquid Plant Food. TIP: for an added boost, apply Yates Thrive Natural Fish & Seaweed+ Plant Food Concentrate.

Starting from seed:

  • Fill starter pots or trays with Yates Black Magic Seed Raising Mix. Sow seeds, lightly cover with mix, firm down and gently water in well. Keep moist at all times and place in a warm and sheltered position until seedlings have grown to 5 cm tall, then plant into the pot.
  • Alternatively, sow directly into the pot where they are to grow. Cover with a 12mm layer of Yates Black Magic Seed Raising Mix. Lightly firm down and keep moist.

Starting from tubers:

  1. Once the weather warms up, stored tubers will start to form eyes or shoots. Once these start to form, the tubers are ready to plant out.
  2. Choose a pot at least 200mm wide with adequate drainage holes.
  3. Position pot in full sun.
  4. Fill the pot with a quality potting mix such as Yates Premium Potting Mix.
  5. Plant them whole with the growing eyes or shoots facing up. When planting make sure that the root end of the tuber is covered by at least 10 cm of soil. 
  6. Once planted, do not water the tubers right away as this could encourage rot. It is best to wait until the sprouts have appeared above the soil to water.
  7. Once the sprouts have appeared, water deeply and keep mix moderately moist at all times.
  8. Feed with Yates Thrive Roses & Flowers Liquid Plant Food. TIP: for an added boost, apply Yates Thrive Natural Fish & Seaweed+ Plant Food Concentrate.

Yates varieties

Dahlia 'Cinderella'

Compact bushes produce a long lasting display of bold and bright blooms in a wide range of colours. Ideal for massed garden colour & pots.


Growing tips

  • Remove spent flowers to encourage further blooms during summer and autumn. 

  • Taller varieties of Dahlias will require staking to maintain healthy growth and lovely blooms. For these varieties it is best to stake the plants upon planting the tubers to avoid any root disturbances later on.

  • To encourage bigger blooms, leave two or three flower buds on the plant, disbud any additional or smaller buds that may form.

  • Allow the plants to die down in late autumn and winter. Once the plants have died down, you can cut the plant down to ground level.

  • In cooler areas or in poorly drained soils, it is best to dig up the tubers and store for the winter. When removing, take care not to damage the tubers and store in a cool dry place until ready for planting. 

  • Dahlias can be propagated from soft tuber cuttings in spring. Once the shoots have formed carefully cut between the shoots leaving some stem tissue surrounding the shoot and one or two tubers attached.
  • When picking flowers for indoor decoration, this is best done in the cool or the evening. 


More Plants

Flax

Flax (Phormium spp.) are highly versatile plants which can grow well in swampy or dry conditions. Great for large pots or en-masse in garden beds.

English Daisy

English Daisy flowers come in single or double forms in colours of pink, red and white. Ideal in pots or in the garden as a border plant or en masse.

Echinacea

Echinacea is a hardy herbaceous perennial with large fragrant pink daisy-like flowers. Used for therapeutic purposes and as a delicious tea.

Virginian Stock

Bright pink, purple, and white blooms prolifically cover this flowering annual in spring and summer. They're easy to grow and are perfectly suited to garden beds, borders and pots.


Recommended products

Yates Black Magic Seed Raising Mix

Specially formulated for trouble-free seed raising in trays (or outdoor seed sowing direclty into the ground) and propagation of cuttings.