When can I plant Radishes in Zone 8b

One of the first steps we take when we are figuring out our gardening schedule is find our USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

A common way of getting a good idea when you can plant radishes is to refer to the USDA zone info for Zone 8b.


Planting Calendar for Radishes

Frost tolerance for radishes: Very tolerant of frost.
When you should plant them: Up to 7 weeks before last frost.

Radishes can survive in a bit of cold which tells us that you can plant them earlier in the year than other frost tender plants.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant radishes
Possibly ok, but a risky time to plant radishes
Probably not a good time to plant radishes

The earliest that you can plant radishes in Zone 8b is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant radishes and expect a good harvest is probably September. Any later than that and your radishes may not have a chance to really do well. Starting your radishes indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Zone 8b the average date of last frost happens on March 15. It might get as low as 15°F during the coldest months of winter.

Always keep in mind that USDA zone info for Zone 8b is an average and our actual date of last frost is different every year. Since half of the time in Zone 8b we get surprised by a frost after March 15 be ready to cover your radishes in the event of a late frost.

USDA Zone Info for Zone 8b

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)March 15
Average Date of First Frost (fall)November 15
Lowest Expected Low15°F
Highest Expected Low20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Zone 8b

You may be interested in our other planting guides for Zone 8b.