Eryngium giganteum 'Miss Willmott's Ghost' - Kew Pollination Seed CollectionEryngium giganteumSea Holly

Sow Eryngium from February to July on the surface of a good seed compost, lightly cover with a dusting of compost or vermiculite, and gently firm down. Place in a propagator at a temperature of 65-70F (18-20C), or seal inside a polythene bag for 14 days. Do not exclude light as this aids germination.

Germination can be slow. If germination doesn’t occur after 2 weeks then move the seeds to a refrigerator for 3-6 weeks. Return to the recommended germination temperature. If germination does not occur in 6-10 weeks, then return to the fridge for a further 3-6 weeks. Examine regularly whilst in the fridge and remove immediately the seeds show signs of germinating.

When seedlings are large enough to handle, transplant and grow them on in cooler conditions until large enough to move outdoors after all risk of frost has passed.

Grow on in a cold frame and plant out the following spring on 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.