Direct sow zinnia seeds outdoors where they are to grow from April to May once the soil has warmed. Choose a position in full sun on moist, well drained soil which has been raked to a fine tilth. Sow seeds thinly, at a depth of 3mm (⅛”) in drills spaced 30cm (12”) apart. Water the ground regularly, especially during dry periods. Germination usually takes 7-14days. When zinnia seedlings are large enough to handle, thin them out to 23cm (9”) apart.
Alternatively, sow indoors from March to April at a temperature of 15-25C (59-77F). After sowing, keep the surface of the compost moist but not waterlogged and do not exclude light as this helps germination. When seedlings are large enough to handle, transplant and grow them on in cooler conditions. When zinnia plants are well grown and all risk of frost has passed, gradually acclimatise them to outdoor conditions for 10-15 days before planting outdoors.
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 and will be stated on the product page or in your order acknowledgement page and email.
Orders for packets of seed incur a P&P charge of £1.95.
Orders which include any other products will incur a P&P charge of £4.95.
Where an order includes both packets of seeds and other products a maximum P&P charge of £6.90 will apply - regardless of the number of items ordered.
Please see our Delivery / P&P page for further details and details of any surcharges that may apply to certain destinations.