Berkheya purpurea 'Silver Spikes' - SeedsPurple Berkheya, Stobaea purpurea

When large enough to handle, transplant seedlings into 7.5cm (3in) pots or trays. Gradually acclimatise to outdoor conditions for 10-15 days before planting out after all risk of frost, 60-75cm (24-30in) apart. For best results, provide a sunny, sheltered position in fertile, well-drained soil.

Grow in full sun in a dry border that remains well-drained through the winter. After flowering cut down the faded flower stem. Plants will tend to disappear over the winter before re-emerging in the spring, so it is wise to mark their position.

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.