Clematis are an enormously varied group. Alla, who gardens near Kharkiv, Ukraine, will discuss the three pruning groups, focussing on her favourites within each group talking about their main characteristics and their growing. For those who are only familiar with the very commercial large-flowered varieties, this will be a revelation, as we explore the subtleties of the many species that are suitable for more naturalistic planting.

Rent access here

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.