Radishes, Raphanus sativus, are annuals or biennials which germinate fast and grow fast, with lobed, dark green leaves to about 15-20cm high, and succulent, sharp-tasting edible enlarged taproots which can be harvested about four weeks after sowing, and can be round, tapering, or cylindrical, and have red, white, green.
Scarlet Globe Raddish Care
Raphanus Sativus 'scarlet Globe'



How to Care for the Plant

Water

Radish plants typically need 1 inch of water per week. Soak the soil as needed (more frequently if the soil drains very quickly) to reach the roots, depending on the type of radish you're growing.

Fertilizer

Since radishes are so quick-growing, they do not require fertilizing, as long as you start with rich soil. If necessary, improve the soil with compost prior to planting.

Sunlight

Radish plants need full sun to partial shade. The common, small radishes must grow quickly in cool weather, so they need plenty of sun.

Soil

Radishes do best in rich, well-draining soil with a slightly acidic to neutral pH of 6.0 to 7.0. Most important, the soil must be loose and not compacted. The roots will no grow well in hard or rocky soil. Sandy soil and loam are best.

Temperature

Radishes are a cool-season vegetable that can mature very quickly. The small, round varieties will get woody if grown in hot temperatures. Radishes decline in quality when the temperature warms. They can get tough and woody or spongy with hollow centers. Once a radish bolts, or goes to seed, the bulb stops forming.

Container

Fast-growing spring radishes grow quite well in pots, and growing them this way is a good option if you are plagued by root maggots. They will need at least 4 inches of soil depth and lots of water.

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