Now we are truly in the throes of autumn, Monty Don turns his attention to collecting fallen leaves. Monty regards these as a free harvest with which to make leafmould; he also shows what to plant now under the shade of trees for colour next year. We meet a gardener in Essex who fills her beds and borders with over 9,000 tulips which are all carefully colour co-ordinated and we find out her favourite combinations. Colour is also on Rachel de Thame's agenda when she travels to Suffolk to look at some of the best small trees and shrubs for autumn colour in the gardens at East Bergholt Place, drawing inspiration from owner and plantsman Rupert Eley. Carol Klein is at the Royal Horticultural Society's garden at Rosemoor in Devon where they grow a collection of one of our most iconic winter plants, holly, and she recommends the best varieties to grow for berries in our own gardens.