When to plant
- Direct seed Apr-May (maybe Feb and June), Sept–Oct (maybe Aug and Nov)
- Growing period depends on the variety and season. Summer radishes mature more quickly, germinating in 3–7 days.
- A fast grower, radish roots reaches maturity in a few weeks and should be harvested quickly.
- Harvest when young and tender, as soon as they reach their mature size. If left in the ground, the radish may crack and will become tough and fibrous.
- Direct seed, planting 1/2 inches deep and thin to 1–2 inches apart to give the radishes room to develop.
- Since radishes mature so quickly and do not hold well in the garden, seed small patches 7–10 days apart to have a continuous supply.
- Winter varieties take longer to mature but keep longer in storage.
- Radishes, Utah State University Extension
Recommended Varieties for Santa Clara County
There are no specific recommendations for radish varieties.