Hymenocallis x festalis 'Zwanenburg'Spider Lily, Ismene

Hymenocallis x festalis requires a minimum temperature of 15°C (59°F). Using loam-based compost such as John Innes No. 2, plant the bulbs in containers with the neck and shoulders protruding above soil level. Space Hymenocallis bulbs approximately 20cm (8") apart. Grow spider lilies on until large enough to move outdoors when all risk of frost has passed. Choose a position in sun or semi shade.

Feed and water Hymenocallis plants regularly throughout the growing season. Move containers of spider lily plants to a warm, bright, frost-free position indoors before the first frosts. Reduce watering in the winter, making sure the compost remains just moist. When pots become congested, divide and re-pot Hymenocallis bulbs in the spring.

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 £4.99.

Where an order includes both packets of seeds and other products, a maximum delivery charge of £6.99 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. Sadly, the time it takes to deliver to certain locations in the UK means that we can't guarantee this, so regretfully we are unable to ship live 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