Episode 21

September is the start of a new season for gardeners; it's about planning for winter and for spring. With that in mind, Toby Buckland shows his favourite way of storing onions by plaiting them into strings.

Alys Fowler tidies up the cut flower crop that have exhausted their blooms for the year and shows how to plan ahead for beautiful spring flowers by planting the versatile ornamental onion - the allium.

The bright flowers of the aster family are the stars of the autumn border and can be in flower from late August through to November. Carol Klein makes the most of the varied and versatile members of the clan in her own garden and shows how best to use them in borders. She also demonstrates some simple propagating techniques to add colour to gardens for very little cost.

And garden designer Arabella Lennox Boyd explains the inspiration behind her own five acre garden, Gresgarth Hall in Lancashire, which she has thoughtfully created over the past 25 years.