Eupatorium cannabinum - Kew Pollination Seed Collection

Sow Eupatoium indoors from March to May for at 20C in a good seed compost. Sow seed on the surface of the compost, gently firm down and cover with a light layer of compost or vermiculite. Do not exclude light as this is required for germination. Keep soil damp but not wet. Germination usually takes up to 30 days. When seedlings are large enough to handle, transplant and grow them on in cooler conditions until large enough to plant outdoors.

When Eupatorium plants are well grown and all risk of frost has passed, acclimatise them to outdoor conditions over 7 to 10 days. Choose a position in sun or semi shade on well-drained soil which remains reliably moist.

Alternatively, direct sow Eupatorium seeds outdoors where they are to grow from May to June on well-prepared soil which has been raked to a fine tilth. When seedlings are large enough to handle, thin them out to 30cm (12”) 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.