Silene laciniata 'Jack Flash'

Sow seed on the surface of a good, free-draining, damp, seed or multipurpose compost and cover with a fine sprinkling of vermiculite. Place container in a propagator or seal inside a plastic bag and place at a temperature of 15-20C (59-68F) until after germination which can take 14-21 days. Do not exclude light, as this helps germination.

Transplant seedlings when large enough to handle into trays or 7.5cm (3in) pots. Gradually acclimatize plants to cooler conditions for a few weeks before planting out after all risk of frost 30cm (12in) apart.

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.