Crocus sativus

Growing in pots doesn't work! Crocus sativus need open ground, sunny and well drained soil. Plant the corms in very fertile organic soil with masses of bonfire ash ridged up over corms at least 20 cm deep. I dig them to go in the airing cupboard for the summer months. The reason they go into the airing cupboard is because the Spanish Saffron Industry research board has indemnified that an optimum storage temperature of 30deg.C for 6 weeks results in multiple flowers.