"ngers crossed . . . danger of night frost is all but past. For containers you need to use a heavy soil-based compost, not one without substance that will dry out too quickly.

I use a home-made, waterretentive mixture of topsoil, garden compost, a handful of dried seaweed (and recently a new organic product called Wormcast, about which we will be hearing more later) and a little peat and horticultural grit to open it all up.