Mark, I don't generally touch pots of seedling bulbs at all until they have had 3 seasons of growth, 2 if they are very robust growers. Chasing around tiny bulbs is a nightmare, especially if your 3 1/2" pot of crocus seedlings has 50+ tiny corms in it which look not much different from the compost mix. Thereafter I completely repot everything every year. In some cases it isn't absolutely necessary but the bulbs generally do better. You can get away with every other year, in which case it is often recommended to replace the compost down to the level of the bulbs. I don't really know why and can't think of a logical reason! If I'm going to leave them for two years without repotting I just clean up the 'grass' and put them back in the greenhouse. I would recommend keeping your aril/arilbred divisions completely dry (but not desiccated) until mid-September, at which point you can give them moisture with minimal chance of rot. I'd keep them dry under the greenhouse bench. J. John T Lonsdale PhD 407 Edgewood Drive, Exton, Pennsylvania 19341, USA Home: 610 594 9232 Cell: 484 678 9856 Fax: 801 327 1266 Visit "Edgewood" - The Lonsdale Garden at http://www.edgewoodgardens.net/ USDA Zone 6b