You can plant out hardy perennials and hardy annuals (poppy, larkspur, BBs) any time, no cloche needed. They don't need protection from cold temps. I try to transplant them when they have a couple of sets of true leaves. I've transplanted these as early as Apr 1 though my last frost date is mid May. Really.

Any warm loving annuals which are very sensitive to cold temps (things like zinnias, cosmos, marigold, coleus, impatiens) - I wouldn't plant out too soon. If you would plant out and cover with a cloche they might fry if weather gets hot. I perfer to wait to transplant those until at least real close to last frost.

That's my 2 cents anyway.

Karen

With nemesia though, I know it's hardy annual. But most of what I read says it loves cool temps, but not frost. Or it's hardiness is 32 degrees? If it's wintersown, will it be hardier thus when planted out, be able to withstand temps colder than 32 at times??

Thanks. I was thinking more of getting my tomato seedlings in a couple weeks early to get a jump on the season. Last year, they sprouted and formed true leaves via wintersowing, but didn't really take off size-wise till they were in the ground.

Caryl