With spring here, Pippa Greenwood explains the science behind the green appearance of leaves. Meanwhile, the daffodils have finished flowering but that's not the end of their life cycle. Alan Titchmarsh reveals how to guarantee flowers for next year, and Rachel de Thame plants herbs.
Series producer Colette Foster ; Executive producer Tony Laryea BBC MAGAZINES: Gardeners' World, £2.60. Gardens Illustrated. £3.50 BBC BOOK: Grow Your Own Cut Flowers. £18.99