Peter, thank you for your reply. I was hoping you would chime in because I know you use a plunge bed. OK I will tend toward deeper, more than 3x diameter, since I want the corms to get bigger; some are under-sized. I do plan to dig them this summer for exactly the purpose of finding out if they multiplied or grew in size. Already planted: Moraea villosa B, M. crispa, M. tripetala, M. gigandra, M. aristata Yet to plant: Moraea villosa A, M. bipartita, M. algoensis, M. fugax, M. ciliata, M. polyanthos The M. ciliata I realize need more space horizontally for their wide leaves. That and the M. tripetala I have grown before. The rest are new to me. Looking in the big blue 'Moraeas of Southern Africa' book, I see my corms are in these span 3 sub-genera. Looks like they are all winter-growing, which makes sense given when they were sent dormant. As for erratic watering, this first year they might get that because it is an outdoor plunge bed and I have not yet begun to build a canopy. We tend to get too much or too little rain here. Too little I can supplement from the rain barrels but too much rain will require a canopy. For food they will have some from the mix. I was not planning to water in fertilizer but I could. - Gastil > It depends on the species/ type of Moraea and also the amount of food available to the plants, planting deeply may also encourage fewer and larger corms ....