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5 for 4 on all seed (cheapest goes free)
* Seed packet image is for illustration purposes only

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24 primrose plug plants - Only £3.49 with any order

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Dahlia 'Black Beauty'Dahlia variabilis

Just £1.29

Half-Hardy Annual
What is Half-Hardy Annual?
A plant that completes its entire life cycle (growth, reproduction, death) in one season.
Can be grown outdoors but requires winter protection from frosts and temperatures below 0C.

Luxurious velvety blooms

Short plants ideal for pots and front of border

The darkest dahlia youll grow!

1 packet (50 dahlia seeds) Save £1.70SEED SALE £2.99 £1.29 Despatch: within 24 hours
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Description Sowing More Info Delivery
Thompson & Morgan's plant breeders have got their paintbrushes out again, painstakingly hand pollinating flowers in the dahlia glasshouse to create a near jet-black variety! The dark velvety blooms appear black until the sun settles on them, revealing a deep maroon shimmer, further enhanced by a vibrant yellow centre. Set these short and stocky plants at the front of the border for a floral display right though to autumn. Set them in stylish containers for a contemporary floral display on the patio. Height and Spread: 35cm (14").

Culinary note: All dahlia flowers and tubers are edible. The flavours and textures can vary greatly depending on the soil and conditions in which they were grown. Flavours range from water chestnut through to a spicy apple or even carrot. For more details about edible flowers click here.

Useful Links:
How to sow flower seeds
Reasons to buy your seeds from Thompson & Morgan


Patio, Cottage Gardens, Exotic Garden, Cut Flower Garden

Half-hardy

Full sun

Up to 35cm (13.8in)

Up to 35cm (13.8in)

Easy for all

Easy for all

1 packet (50 dahlia seeds) (TM04351)

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Sowing Months Flowering Months
Feed and water dahlias regularly throughout the growing season. While plants are still young, pinch out the growing tip of each stem to encourage bushier growth and masses of flowers. Deadhead faded dahlia flowers to encourage more blooms to be produced.

Sow Dahlia seeds indoors from February to April on the surface of a good, free draining compost and lightly cover with a fine sprinkling of compost or vermiculite. Place the seed tray in a propagator at a temperature of 20-25C (68-77F) or seal inside a clear polythene bag until germination which takes 7 - 21 days. Keep the compost damp but not wet and do not exclude light as this helps germination.


When seedlings are large enough to handle, transplant into 7.5cm (3") pots and grow Dahlia plants on in cooler conditions. When all risk of frost has passed, gradually acclimatise to outdoor conditions over 7 – 10 days before planting outdoors. Plant Dahlias at a distance of 30cm (12") apart on any fertile, well drained soil in full sun.

Delivery

Seeds and garden supplies will normally be delivered within the time period stated against each product as detailed above. Plants, bulbs, corms, tubers, shrubs, trees, potatoes, etc. are delivered at the appropriate time for planting or potting on. Delivery times will be stated on the product page above, or in your order acknowledgement page and email.

Orders for packets of seed incur a delivery charge of £1.95.

Orders which include any other products will incur a delivery charge of £4.95.

Where an order includes both packets of seeds and other products, a maximum delivery charge of £6.90 will apply - regardless of the number of items ordered.

Large items may incur a higher delivery charge - this will be displayed in your shopping basket.

Please see our Delivery page for further details, and more information on different charges that may apply to certain destinations.

Satisfaction Guaranteed

For your complete peace of mind, our Home and Garden products may be returned to us within 30 days of purchase for a refund of the purchase price. Items must be returned unused, at your cost and in mint condition. All items carry a manufacturer's 12 month defects warranty.