Holder of the British national Aster collection and the third generation of her family to run a nursery, few are as well placed to talk about the number one late summer/autumn perennial genus. She focuses on the current taste for natural-looking  and robust plants, with lively descriptions of what she things are the most outstanding species and varieties. And she enlightens us about the recent name changes too.

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Rental for 30 days is, mostly, $15, £12 or €13 approx) through the Vimeo on Demand service. This requires that you sign up to Vimeo, but this is an absolutely minimal inconvenience (and they won’t bother you with marketing). Video length is usually around an hour.