In a few weeks hopefully all danger of frost will be over. This will be the time to plant out the more tender veggies. Today I made a first sowing of sweetcorn 'Extra Tender & Sweet'. In the past few years better sweetcorn varieties have been bred which are more suitable for our British climate. I grew some of these F1 hybrid varieties last year and they really last on the plant for several weeks without going over. Well worth the extra money you have to pay for an F1 hybrid. I've left another dozen seeds in the packet for a second sowing in May. Now is a good time to start saving eggshells. I dry them in the greenhouse till they are brittle, and when I plant out my tomatoes I scrunch a handful of crushed eggshell into the planting hole to provide extra calcium for the plant.