Radish Growing Guide Crop Rotation Group Brassicas (Cabbage family) ● Soil Almost any soil with good drainage. Position Sunny for spring and autumn sowings, light-shade for summer sowings. Frost tolerant Yes Feeding Not required. Companions Lettuce, Catnip, Nasturtium, Cucumber, Spinach and Beans. Jane recommends Pea, Nasturtium, Lettuce. Spacing Single Plants: 10cm (3") each way (minimum) Rows: 10cm (3") with 20cm (7") row gap (minimum) Sow and Plant Sow direct into the ground. Our Garden Planner can produce a personalised calendar of when to sow, plant and harvest for your area. Notes A really good crop for growing in between others, especially as it grows to maturity so quickly. Harvesting Harvest as soon as the root has developed to a usable size, while taste and texture are still good. Planting and Harvesting Calendar < Back to All Plants Pests which Affect Radish Aphids (General) Cabbage Root Fly Slug Snail Plant Diseases which Affect Radish Brassica Alternaria Leaf Spot Brassica Club Root