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Planting in Zone 8b

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Can I Plant
May 01, 2023 (Last Updated: ) | Reading Time: 1 minutes

Here is some general information about the USDA plant hardiness zone info for 8b.

Average date of last frost in the spring March 15
Average date of first frost in the fall 2015-11-15
Lowest expected low temperature 15°F (-9°C)
Highest expected low temperature 20°F (-6°C)

This means that on a really cold year, the coldest it is likely to get in 8b is 15°F (-9°C). Most of the time you can plan on expecting the lowest temperature to be around 20°F (-6°C).

Choose a plant below for more information about how to grow it in 8b.

Vegetables

Herbs

Flowers

Comments

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Kathy Overton - 2025-01-17 16:58:26

reply

I live in Zone 8b, western WA state. The last frost here is generally the last week of April. This conradicts the chart shown here by quite a lot. We would be foolish to to plant anything tender in March.

avatar

Jason Bauer - 2025-01-18 11:47:00

Hey, fellow West Coaster, I live in 8b as well, in southern Oregon. My dad also lives in 8b, and we have vastly different climates. Sometimes, I think the Sunset zones would be a better choice to determine the last frost date.

Remember that the "average" last frost means roughly half of all years; you will get a frost after that date. I can remember plenty of years when we did not get a frost after March 15th, so the published date seems valid for my data set, but I like to live on the edge. I believe you might as well try to get an early harvest. If you fail, just plant again. Seeds are cheap!

Thanks for the comment! Feedback like this helps us all get a little bit better at gardening every year.

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