At this time of year (after a Winter of neglect!) the greenhouses look a bit worse for wear. Ideally I would start potting now – i.e. at the end of March – but often don’t start until the middle of May which is really too late. Crassulaceae get potted every year but the cacti and mesembs get potted every two years and other groups such as the haworthias even less often. Conventional plants, of which I have very few, are potted annually. I used to do a lot of specialist seed raising every year but because of time restraints do hardy any now. I used to do the sowing from January onwards in an airing cupboard (which we no longer have) before the potting/repotting of the main collections started.