Plumb Rose (May) Plumb Rose (May) Plumb Rose Dark-tipped, purple leaves with grey shadows. £3.00 Out of stock. Purple leaves with darker tips and grey shadows, sometimes even blueish or violet tinged. Especially nice in spring but keeps good colours all through summer. Bred by Polly Bishop (USA) 1977 Often seen (wrongly) as 'Plum Rose' Sent in 9cm pots as growing, established plants.