Dahlia Cornwall Island

PRE ORDER Estimated Shipping date: Early to Mid February 2026

Regular price: £13.99
Regular price
Sale price: £13.99

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Tubers 3 Tubers 1 Tuber

Product variants

Vibrant summer colour brightens garden beds
Long flowering period with regular deadheading
Great choice for fresh cut flower displays
Thrives in borders and large containers

Dahlia 'Cornwall Island' creates a stunning display with its abundant, bold blooms that captivate the eye. Supplied as dormant tubers (not growing plants). Plant tubers 10–15cm deep and 30–40cm apart in well-drained soil after the risk of frost has passed.

Planting Calendar

Flowering Calendar

Dahlia Cornwall Island - Plant information

Size: Grows to approximately 90cm tall with a spread of 45cm.

Position: Thrives in full sun. Prefers well-drained soil and a sheltered spot away from strong winds.

Feeding etc: Feed monthly with a balanced fertiliser during growing season. Remove dead flowers regularly to extend blooming.

Care: Plant tubers 10–15cm deep and 30–40cm apart. Protect from frost during winter. Water moderately and deadhead spent flowers to encourage more blooms.

	Starter Plant (Plug Plant) Plug Size: 2cm by 4cm. Our most popular size. This is often the most economical way of buying plants and is a great way to get a head start on the season. Generally this size is best to be potted up before planting out.
	Jumbo Plug Plug Size: 6cm by 7cm. A fantastic alternative to a 9cm pot and saves on plastic too. The plants in this size are well established and give you a head start. This size is perfect for planting straight into containers and baskets as well as the garden.
	9cm pot Pot size: 9cm by 9-10cm. This size hold some well established plants, some of which maybe around 1 year old. We sell most of our ranges in this size and most of the plants sold in this size, are established enough to be planted straight outside.
	13cm or 1 litre pot Pot size: 12-13cm by 12-15cm Currently our largest size of plant, with the exception of our planted containers. Many of our House Plants are available in this size, as well as some special collections and varieties.