When and where I am not quite sure but would like to find room for some of :
Spring Colour
Crocus 'Remembrance'
Crocus 'Vanguard'
Erythronium californicum 'White Beauty'
Iris 'Sheila Ann Germany'
Summer onwards interest
Agastaches - 'Blue Haze'(Blaze?),'Black Adder', 'Licquorice Candy', 'Blue Boa' and 'Desert Sunrise'
Aster x herveyi (previously aster macrophyllus 'Twilight')
Echinacea 'White Swan'
Eutrochium 'Gateway'
Laserpitium siler - long - lived umbifiller - looks similar to orlaya.
Lobelia 'gerardi'
Persicaria amplexicaulis 'alba'
Rudbeckia 'triloba'
Sanguisorba officinalis 'Arnhem' - July/August flowering - good partnership with taller molina varieties
Sanguisorbas 'Lilac Squirrel', obtusa, 'Cangsham Cranberry', tenuifolia parviflora and officianalis
'Pink Tanna'.
Sedum - 'Jose Aubergine' (possible partners - penstemon 'Andenken an Friedrich Hahn' and salvia verticillata 'Smouldering Torches'.
Salvias 'Armistad', 'Javier' and Nachtvlinder'
Verbena rigida polaris
Grasses
Panicum 'Blood Brothers', 'Shenandoah' and 'Northwind'
Pennisetum 'Redhead',Tall Tails, Karley Rose' and 'Hamlyn'.
Further research needed
Hamamelis 'Gingerbread'
Rubus 'Silver Form'
Salix 'Melonostachys'
'Schizacayrium 'The Blues'
