When to Plant Pentas in Belgrade, MT

The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Belgrade you can estimate when it's the best time to plant pentas by using the USDA zone info.


Planting Calendar for Pentas

Frost tolerance for pentas: Not tolerant of frost.
When to plant: After the last frost when the weather gets warmer.

Pentas require warm weather which means that you need to wait until it warms up after the last frost has passed before you can plant them.

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

The earliest that you can plant pentas in Belgrade is May. However, you really should wait until June if you don't want to take any chances.

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

Last Frost Date

On average the last frost has passed is on May 15 in Belgrade. You should expect an average low temperature of -30°F in the coldest months of winter.

Always keep in mind that USDA zone info for Belgrade is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Belgrade you get surprised by a frost after May 15 so be sure to be ready to protect your pentas if you have a late frost.

USDA Zone Info for Belgrade

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)September 15
Lowest Expected Low-30°F
Highest Expected Low-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Belgrade

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