@megwattscreative I am about member of the Hardy Plant Society and the Cottage Garden Society which gives me access to their seed sharing schemes so loads of perennials from them. Well worth joining both for the rare and unusual varieties and the fabulous communty. I also want to grow some rare sorbus multi stems and visited a number of arboretum in autumn 'liberating' the odd seed from the Lovell Tree Collection (developed by the Prof Lovell who set up Jodrell Bank), Bluebell arboretum gave me a few seeds from their Sorbus Yunnan Pink that they grew from seeds gifted to them by a Buddhist Temple in Yunnan province, and a I collected a few different varieties from Castle Howard. I only take a few seeds after they have dropped They spent winter in my fridge (much to my wife's disgust). I am starting to take cuttings (the Rosie Hardy on-line course fed my obsession) and plant on overwintered more tender plants. Also veg for the garden.