I started a load of veg & herb seeds in pots, trays and guttering at the weekend (9th March) and placed them on a shelf under the window in my garage. Since then, temperatures have plummetted and some of the compost in some of the pots has partially frozen! I don't think they're frozen solid, perhaps just the surface and edges.
Can anyone please tell me: will this kill my seeds? I've since covered them up in a blanket to try to thaw/protect them.