>I grow hundreds of bulbous species that come from areas with >alkaline soil, and I grow them in a slightly acidic but very well drained >medium. I've rarely bothered to add lime to my growing mix. I am now adding small amounts of lime to all potting mixes. I think that the warmer and higher humidity of North Carolina makes this necessary in contrast to the cooler and dryer growing conditions previously encountered in Connecticut. From temperate to tropical, add more lime to the mix. Mark Mazer Hertford, North Carolina USDA Zone 7b-8