BrassicasBrassicaceae

Radishes.

Cool season
At a glance

The spec sheet.

Direct sow / out
Apr 1 – Sep 15 (successions)
Germ
3–7 days
Days to harvest
25–35
Spacing
1–2" apart
Depth
½"
Square-foot
16 per square
Qty target
One square-foot every 2 weeks keeps you in constant supply.

Plant

Direct sow every 2 weeks. Fastest crop in the garden — ready in 4 weeks.

Care

Thin ruthlessly for good bulbs. Consistent water keeps radishes crisp; drought makes them woody and hot.

Harvest

Pull when quarter-sized; leave in longer and they get pithy.

Preserve

Fresh only. Can be quick-pickled for tacos and slaws.

Companion planting

What radishes likes, and doesn’t.

Avoid nearby

Radishes planted around squash mounds deter squash bugs. Also a trap crop for flea beetles protecting brassicas.