China Rose Radish Seeds (Winter Type) Heirloom Vegetable. A good keeping variety with dark pink to reddish skinned roots averaging 15-20 cm (6-8″) in length and 5-6.5 cm (2-2.5″) in diameter. The flesh is white, crisp, juicy and pungent. Although frost hardy, winter radish roots will not survive winters harsher then Zone 8.