Sometimes I wonder if it isn't a basic flaw in the USDA hardiness scheme, or the way we use it.
Doesn't "average minimum winter temperature" mean that around half of all winters will go lower than that?
How useless would a warranty be that read "this product will only kill your plants 5 years out of 10"?
I would like to have Hardiness Zones popularized that told me what temperature 90% of my winters did not go below, or 95%!
Also, I really hope that annual seed pkts base their sowing instructions on "80% last frost date", not USDA Hardiness zones or 50% frost date.
I didn't really want to PLAN my garden so that half of all crops are killed by normal weather even BEFORE I start killing them off with my clumsiness!
