When can I plant Zucchini in Zone 5b

One of the first steps we take when we are figuring out our gardening schedule is find our USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

You can estimate when it's the best time to plant zucchini in Zone 5b by referring to the USDA zone info.


Planting Calendar for Zucchini

Frost tolerance for zucchini: Not tolerant of frost.
When you should plant them: After the last frost.

Since zucchini are not cold tolerant it's necessary to wait until after the last frost before you can plant them.

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

The earliest that you can plant zucchini in Zone 5b is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant zucchini and expect a good harvest is probably August. If you wait any later than that and your zucchini may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your zucchini indoors.

Last Frost Date

The average date of last frost is April 15 in Zone 5b. In the coldest months of winter we can expect an average low temperature of -15°F.

Remember that USDA zone info for Zone 5b may not be accurate from year to year and our actual date of last frost is different every year. Since half of the time in Zone 5b last frost occurs after April 15 be ready to protect your zucchini if we have one of those late frosts.

USDA Zone Info for Zone 5b

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-15°F
Highest Expected Low-10°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 -10°F.

Plants to Grow in Zone 5b

You may be interested in our other planting guides for Zone 5b.