Sorry to hear that, Bev.
I've had that happen too - especially late spring where we have cool days then suddenly a 90+ day. Two years ago I lost all my seedlings when that happened.
Lynn, do you think this method could work for overwintering young plants too? I have wanted to get some little hybrid lavenders but was afraid to buy them in autumn or winter because of our icy wind and frosts.
Greg, I definitely will! I am pretty excited to try this method. I start most of my seeds around April because of the frost and then it is a race to try and grow seedlings large enough to survive their first hot day and attacks from spider mites. The weeks this will add to my growing season has me ready for cold weather