The bulbs you receive should be planted as soon as you are able to and kept moist at all times. They should flower during the year following planting. The odd one may take a year longer. The bulbs have been treated with a mild fungicide to protect them against disease.
Planting Erythronium in Pots
Use well drained compost with plenty of organic matter. Potting compost with some grit or perlite or bark added to open up the compost works well.
Plant in deep pots if possible – the bulbs ordinarily position themselves quite deeply, for example in a 2 litre deep pot often in the bottom quarter.
Keep moist, roots will develop in late summer / autumn and leaves appear from early March onwards. Protect from slugs and keep in a cool shady place. Protect from frost with fleece or similar.
Planting Erythronium in open garden
Erythronium in the wild often grow where it is cool with light dappled shade. Prepare soil well with added organic matter. Old compost or leaf mould is ideal as an additive. Plant the bulbs so that their growing tips are 50-60mm below the surface. Apply surface mulch of organic material and protect from slugs from late February onwards.