Rhubarb Crumble (May) Rhubarb Crumble (June) Rhubarb Crumble (April) Rhubarb Crumble Red and yellow/beige in spring. £3.20 This one shows a wonderful mix of colours as spring progresses, starting off dark red. Then the magic starts and the rhubarb crumble colours come on, a tasty mix of red and yellow/beige. Grows well. Bred by Sue Thomas (GB) 1999 Sent in 9cm pots as growing, established plants.