Dahlia 'Thomas A. Edison'

Dahlia 'Thomas A. Edison' is a true show-stopping dahlia and one of my long-standing favourites. Mix with other dahlias, or plant with veg. More
3 litre plant 229146-3L £9.95

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Dahlia 'Thomas A. Edison' is a true show-stopping dahlia and one of my long-standing favourites.

Mix with other dahlias, or plant with veg. It looks superb with cabbages and Kale 'Redbor' and is the real show-stopper in the autumn Oast garden.

Tubers should be potted up when they arrive and be kept in a light, frost-free place until the frosts are over and then be planted into the garden. They come with full planting, spacing and cultivating instructions for beginner gardeners.

Genus Dahlia
Group/Species Decorative Group
Variety Thomas A. Edison
Type Tender Perennial Tuber
Border Position Back, Middle
Bulb Size 1
Soil Type Acid, Chalky, Fertile, Neutral
Scent Unscented
Site Full Sun
Moisture Moist but Well-drained
Height 1.2m (47in)
Spacing Plant just under the soil surface, 75cm (30in) apart.
Sowing, Seeds, Planting Pot them up undercover March or early April in a generous pot (at least 2 litre) filled with multi-purpose potting compost. Place them in a light, frost-free place and keep the compost moist. Pinch out their growing tips when they have reached about 8" tall. They will have formed bushy plants by the time the frosts have ended and will be in flower by the beginning of July. If you don’t have anywhere to grow the potted tubers, you can put them straight into the ground when the frosts are nearly over, mulching them or protecting with a cloche or protective horticultural fleece if the foliage appears before the frosts are over, but this will delay flowering.
Care Tips Support with a stout stick, tie in every couple of weeks. In the south you can mulch deeply and overwinter them in the ground, alternatively, lift and overwinter your dahlias frost free undercover.
Flowering July - November
Vase Life Only pick dahlias in full flower. Recut the hollow stem ends under water to avoid airlocks.
Cooking Notes All dahlia flowers are edible. I use the petals scattered over salad and to decorate a range of puddings.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • Sow Under Cover/Plant Indoors
  • Direct Sow/Plant Outdoors
  • Flowers/Harvest
Advice & Videos
How to take dahlia cuttings

Watch and learn how to take dahlia cuttings – turn 1 tuber into 10.

How to plant and grow dahlia tubers

Find out how to grow strong, healthy dahlias this spring – how to plant, look after and overwinter them, and what to do with your bulbs when...

How to overwinter dahlia tubers

Sarah discusses the best options for overwintering dahlias – lifting or mulching.

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Dahlia 'Thomas A. Edison' reviews

* * * * * Average based on 8 reviews
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Dahlia Thomas A.Edison

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Reviewed 3rd July 2018 by Alison

I've never bothered with writing a review before but I am so impressed with this utterly gorgeous dahlia that I'm bursting with praise for this truly beautiful plant. The colour is deep and goes with my other dahlias or looks stunning with the ammi sowed from you. If you only buy one dahlia, then this is it but leave some more for me next year !

Showstopper

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Reviewed 18th November 2016 by K Beaz

I got these to go with American Dawn. They go beautifully together but I thought these with their deep rich colour were even better. I've had lots of compliments at the allotment where they flowered so prodigiously I had often had armfuls to give a way.

Absolutely Stunning

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Reviewed 16th October 2016 by Beverley Goggin

I purchased a tuber for this particular Dahlia from Sarah Raven earlier this year. It is an absolute stunner both in size and colour. I never lift my tubers but choose to heavily mulch my garden instead. That said, I've never lost any of my Dahlia's (all of which are from Sarah Raven) and look forward to enjoying many more beautiful blooms for years to come.

Huge and Heavenly

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Reviewed 23rd January 2016 by Judi Delaney

I bought my original tuber from here about 5 years ago, and following Sarah's instructions for lifting and replanting each year, this has proved to be one of the most stunning dahlias in my garden. It produces huge flowers with the most incredible clear colour, and when in a vase everyone always comments on it. I also follow the advice to keep cutting the blooms from the plants once a week to help it keep producing and it really does pay dividends, and the kitchen looks wonderful with jugs full of these beauties.

Stunning

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Reviewed 23rd August 2015 by Mrs J Remington

Have grown this in a large terracotta pot and have been amazed by it. The flowers have all been as large as my stretched hand span and the depth of the colour is breathtaking. If you love dahlias this should be high on your list to grow.

Massive purple flowers

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Reviewed 11th August 2015 by Jemma Kennedy

This dahlia hasn't grow very tall yet at 35cm (all the others are 70cm+) but the two flowers it has produced are 17cm in diameter and very beautiful. Quite stunning. Will buy more tubers next year.

Great mixed with dark dahlias, especially Chat Noir

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Reviewed 12th April 2015 by Dr C

I grow these mixed in with Chat Noir and they grow well together but, more importantly, look great together - particularly in a vase with a few crocosmia stems. I always follow Sarah's planting instructions and the tubers are always of great quality when they arrive, ready for planting. The young shoots will need protection from slugs and snails until they get established and they will need some strong staking. Regular deadheading will keep them flowering until the first frosts.

Just great

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Reviewed 13th January 2015 by Jill Williams

Having had my dahlia bed flooded in January I reinvested in case I had lost them all - in fact about half grew very well. One of my 'new' choices was Thomas Edison. I started them off indoors and Thomas Edison gave me three splendid plants which started flowering in June and went on till November, giving loads of colour and plenty to cut for the house. It was always the one which visitors commented on first - amazing depth of colour and robust plants. Plants have to earn their place for me in Brittany, with a garden only 3 metres wide and 50 m long, sloping down to the river, and everything always 'on view'. The dahlias are in the lower 'fifth' and draw the eye down to tempt us away from the house - even though the walk back is a bit of an effort at 84! - and Thomas Edison certainly earns his place.