Buy Rosy's plants via mail order - https://www.hardysplants.co.uk/all-pl...
(Limited stock | UK Mainland only)

Plant list and zones:
Allium 'Ambassador' 8-4
Euphorbia characias 'Black Pearl' 10-7
Ranunculus montanus double flowered 6-3
Veronica 'Bergens Blue' 8-4
Armeria caespitosa 'Bevans Variety' 9-4
Polemonium 'Heaven Scent' 7-3