I noticed today our water has slowed a lot.
How tall is the sweetcorn Alex? If it's cold again and you havn't any fleece could you put newspaper over it?
Our plum trees are in flower, the lovely small red and yellow fruiting one has been a mass of flower, just hoping it will still bear fruit. Brought pots of lilies in at about 2am, all leaves flopped, but in a cool room have recovered.
Certainly caught us out, but not unknown for April, don't trust it till end of May round here.