🍠 When to Plant Radish

When should I plant radish?

Plant radish outdoors 6 weeks before last frost.

Is radish frost sensitive?

Radish can tolerate light frost, surviving temperatures as low as 32°F. This makes it a great candidate for early spring or fall planting when other crops can't go out yet.

What temperature does radish need?

Radish grows best between 40°F and 65°F. It can survive down to 32°F, but growth slows significantly below 40°F. It prefers cool weather and may bolt or stop producing if summer heat arrives early.

How long does radish take to grow?

Radish typically takes 22–30 days from transplant (or direct sow) to first harvest.

Is it too cold to plant radish?

It is too cold to plant Radish outdoors when nighttime temperatures are falling below 32°F. While Radish can tolerate temperatures as low as 32°F, growth will be slow until nights consistently exceed 40°F. Use CanIPlant to check your local 7-day forecast and get a real-time answer for your ZIP code.

Is it too hot to plant radish?

Radish starts to struggle when temperatures climb above 65°F. As a cool-season crop, Radish is especially heat-sensitive — high temperatures cause bolting, bitter flavor, or complete crop failure. Avoid planting in the peak of summer and opt for spring or fall instead. CanIPlant checks your local forecast highs to flag this automatically.

Any tips for growing radish?

One of the fastest vegetables. Spring or fall.