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When to Plant Strawberries in Johnston, IA

The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Johnston should be read to figure out when it's the best time to plant strawberries.

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Planting Calendar for Strawberries

Frost tolerance for strawberries: Very tolerant of frost.
When to plant: Up to 7 weeks before last frost.

Strawberries are one of those plants that can tolerate quite a bit of cold weather which means that you can get them planted much earlier than other plants that might not handle the cold.

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

The earliest that you can plant strawberries in Johnston 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 strawberries and expect a good harvest is probably September. You probably don't want to wait any later than that or else your strawberries may not have a chance to grow to maturity. If you are starting your strawberries indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

On average all chance of frost has passed is on April 15 in Johnston. It might get as low as -20°F during the coldest months of winter.

Just be sure to remember that the actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Johnston and it is different every year. Since half of the time in Johnston it frosts late in the year after April 15 be ready to cover your strawberries in the event of a late frost.

USDA Zone Info for Johnston

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-20°F
Highest Expected Low-15°F

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

Plants to Grow in Johnston

You may be interested in your other planting guides for Johnston.