Radish RUDI 550 SEEDS £1.70 Quantity: at £1.70 each Add To Basket Globe shaped red radish. An excellent variety for field cultivation during the whole growing season. Sowing instructions: Sow outside from March onwards in rows 15 cm apart. Sow at 15-day intervals for a continuous supply. Ready to harvest after 4-6 weeks. Average contents: 550 seeds.