As the nights become colder, Monty Don advises on what plants need protection and how to nurture tender plants over the coming months. He also plants tulips and wallflowers for late spring colour. Carol Klein celebrates ornamental grasses, Adam Frost travels to Peterborough to find out about the work of a Children in Need project for disadvantaged and vulnerable youngsters, while Nick Bailey gives a guide on how to build a cold-frame for an affordable price. Plus, a visit to an enthusiast in Surrey who grows thousands of South African succulents in his back garden.