7 tubers 229257-7 £27.50

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14 tubers 229257-14 £49.95

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A mix of my favourite old varieties, with a sprinkling of the new superstars.

This collection includes:

This can be gift wrapped in our exclusive hessian sack, with ribbon and a Sarah Raven gift card. You will be able to add this to your basket once you begin the checkout process. To add a gift message to your order, simply fill out the details at the delivery stage of the checkout.

Please note: only items which are showing ‘in stock’ can be gift wrapped.

Group/Species Anemone Group,

Centre compromises of dense elongated tubes rather than a disc. The outer parts have one or more rings of flattened petals. Click here for more information about dahlia groups.

Cactus Group,

Similar to semi-cactus, but with narrower petals. Also includes Fimbriated Cactus dahlias. Click here for more information about dahlia groups.

Decorative Group,

Broad and flat petals, normally bluntly pointed, with no central disc showing. Click here for more information about dahlia groups.

Miscellaneous Group,

Orchid-flowered and Peony-flowered types are classified as Miscellaneous. Also includes Double Orchid-flowered, Bishop, Mini Bishop and Star dahlias. Click here for more information about dahlia groups.

Waterlily Group

Fully double blooms made up of curved, slightly curved or flat petals. Very shallow in depth giving an almost saucer-like appearance. Click here for more information about dahlia groups.

Common Name Dahlia
Border Position Cutting Garden
Bulb Size I
Soil Type Broad Tolerance
Scent Unscented
Site Full Sun
Moisture Moist but Well-drained
Height 1.2m (4ft)
Spacing Plant just under the soil surface, 75cm (30in) apart.
Sowing, Seeds, Planting Plant just under the soil surface after the last frosts. Alternativley 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
Understanding dahlia groups

A list of the different dahlia groups, along with some classification info and an example of a variety in each group.

History of the dahlia

First discovered by Aztec Indians and used for food and medicine, this tuber has an interesting history of cultivation.

How to plant and grow dahlia tubers

Discover how to grow strong, healthy dahlias – how to plant, look after and overwinter them, and what to do with your bulbs when they arrive.

How to overwinter dahlia tubers

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

Sublime dark dahlia flower arrangement

Sarah shows you how to make a gorgeous large arrangement of dahlias.

Planting narcissi bulbs with dahlias

Have a beautiful display of flowers in your garden from March to the first frosts with this simple planting technique.

New favourite dahlia arrangement

Sarah shows you how to make a quick arrangement of colourful dahlias.

Growing dahlias in pots

Sarah shows you her favourite dahlia varieties for pots, and gives you some tips on how to grow them successfully.

How to take dahlia cuttings

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


Bulb Delivery - When in stock, please allow up to 5 days for despatch.

Click here to find out more information about our delivery rates and times.

Bonanza Dahlia Collection reviews

* * * * - Average based on 12 reviews

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Reviewed 13th August 2019 by Margaret

The dahlias are beautiful and growing strongly. In subsequent years I expect that they will be equally stunning.

All the plants I have purchased in the past have been of excellent quality.


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Reviewed 10th August 2019 by Elizabeth

Generally all doing well. Service excellent. Bacardi and karma fuchsiana are my favourites so far

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Reviewed 1st August 2019 by Jennifer

Just love the colours and they are now flowering so well

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Reviewed 31st July 2019 by Janey

These are beautiful. One of the tubers did not take so after mentioning this to Sarah Raven she sent me another set.

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Reviewed 31st July 2019 by Janey

The service is always very good. I feel as though I am talking to some one who is very knowledgable. I love to take inspiration from Sarah's colour and planting schemes which are so artistic.

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Reviewed 31st July 2019 by Elizabeth

Although the products are good some of the dahlias have been disappointing and have yet to flower and grow at the same rate as others.

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Reviewed 31st July 2019 by Paul

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Reviewed 31st July 2019 by Karin

2 of the tubers didn’t grow. However all the others grew into healthy beautiful plants

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Reviewed 31st July 2019 by Kate

Same as before ! This is a very difficult thing to do !

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Reviewed 31st July 2019 by Verity

Developed a fungus very early on and had to be thrown away

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Reviewed 31st July 2019 by Penny

The dahlias that grew are great, but only 3 came up, not sure why not

I'm delighted!

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Reviewed 11th July 2017 by Barbara Frodsham

I'm chuffed to bits with these dahlias. I love the different colours of both flowers, leaves and stems. They are producing lots of flowers and I feel like a proper gardener!
Let's see what happens when autumn comes :-)