Thanks for the reassurance Heather. As I wrote to Kay, these Irises are important to me and I may have been fussing a bit too much. We don't normally get chinook style weather here and it threw me. Of course, it's always when I over react that it turns out the weatherman was too. The forcast is no longer for such a dramatic temperature swing, only a minor one. :-) Thanks to both you and Kay, Marianne At 01:15 PM 12/16/97 -0800, you wrote: >Marianne, >We get a temperature extremes here all the time with no snow cover and >for the most part the perennials survive. Some winters my plants get so >confused. Right now a lilac bush is showing the green through its buds >but we have been down around 0 several times. We do not often go much below >-15C but it doesn't always come with snow cover. If you have mulched the >plants should be mostly fine the burying and straw around the pots should help. >Heather on Vancouver Island mlepa@adan.kingston.net Southeastern Ontario AgCan zone 5b