Half-hardy Perennial
£3.99
Dramatic jet-black foliage
Double to semi-double scarlet flowers
Exceptional flower production
Out of Stock
Height Up to 70cm (28in)
Spread Up to 30cm (12in)
Half-hardy Perennial
patiocottage gardensexotic gardencut flower garden
full sun
Dahlia ‘Black Forest Ruby’ offers the rare opportunity to grow a dramatic dark-leaved dahlia from seed! ‘Black Forest Ruby’ is a stylish dahlia that will add plenty of colour into the late garden without neglecting class. Semi-double to double flowers in varying shades of scarlet to dark red pop against a background of striking jet-black foliage. These dahlia seeds grow on to form strong, bushy plants with knee-high growth and are outstanding for their flower production. Height: 50-70cm (19-28in). Spread: 30cm (12in).
Useful links:
How to sow flower seeds
Reasons to buy your seeds from Thompson & Morgan
Show Codes
1 Packet (30 Seeds) (KF8338)
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.
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 £2.99.
Orders which include any other products will incur a delivery charge of £6.99.
Where an order includes both packets of seeds and other products, a maximum delivery charge of £7.99 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.
For more information on how we send your plants please visit our Helpful Guide on plant sizes.
Thompson & Morgan strives to ensure that all its plants are delivered to you in the perfect condition for planting. While the majority of our nursery plants cope well with slight delays in intransit, sadly, the time it takes to deliver to certain locations in the UK means that we can't guarantee this for some of our smaller plug products and tender bedding and vegetable lines, which do not respond well to the extra journey time. So regretfully while we offer the majority of our live plant offering nationwide, we are unable to ship plugs, begging plants and tender vegetable plants to the following areas: HS, IV41-IV49, IV51, IV55-56, KW15-KW17, PA34, PA41-48, PA60-PA78, PA80, PH40-PH44, TR21-TR24, ZE1-ZE3