28 Days. Icy white roots grow 5″ long and are icicle-shaped. Flesh is white, crisp, mild. Ready to pull about 28 days after seed is sown. Seed Kingdom 500 Radish White Icicle Plant Seeds Contains 500 seeds for abundant planting Scientific name: Raphanus sativus Fast-growing with a harvest time of just 28 days Heirloom variety, preserving traditional gardening practices Produces icy white roots that are 5″ long and icicle-shaped