Radish Cultivated Radish

Raphanus sativus

Radishes are generally free from pests, although some are troubled by flea beetles. They can be planted and allowed to go to seed near squash plants to deter squash bugs.
The secret to good radishes is plenty of even moisture. Supply sufficient water to plants without creating waterlogged soil. If allowed to dry out, radishes taste hot.
Plant in cool weather to avoid hot radishes.
Replant small crops every 2 to 3 weeks. Thin shortly after they emerge because they mature so quickly.

Radishes are very quick and easy to germinate, and no special attention is generally needed. If you are starting them extra early in spring, a warm water soak for 1-2 hours before planting will be helpful, but is not necessary.

Germination Time (Days)
29 days at 41° F
11 days at 50° F
6 days at 59° F
4 days at 68° F
4 days at 77° F or higher

Radishes do not respond well to transplanting. Root and leaf varieties should be directly sown in stone-free soil in early spring to early summer, and again in late summer for fall crop. Pod varieties should be directly sown in warm weather. Make successive sowing every 2-3 weeks.

These plants will grow well with Radish:

Beets, carrots, spinach and parsnips, cucumbers, lettuce and beans.

These plants will not grow well with Radish so avoid planting these within close proximity:

Cabbage, cauliflower, brussels sprouts, broccoli, kohlrabi and turnip.

These pests are known to attack Radish plants:

• Flea Beetles
• Cabbage Root Fly

These problems and diseases are known to effect Radish plants:

According to the book 100 Vegetables and Where They Come From, written by William Woys Weaver, radishes were used in the 18th century treat the common cold, digestion problems, and kidney stones.