When to Plant Pentas in Algona, IA

Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The first chance to plant pentas in Algona should be figured out by checking out the USDA zone info.

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Planting Calendar for Pentas

Frost tolerance for pentas: Not tolerant of frost.
When to plant: After all chance of frost has passed.

Since pentas are not cold tolerant it is necessary to wait until after the last frost has passed before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
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 Algona 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 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 really do well. Starting your pentas indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Algona the average date of last frost happens on April 15. It might get as low as -20°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Algona is an average and the actual date of last frost changes from year to year. Half of the time in Algona it frosts late in the year after April 15 so make sure that you are ready to cover your pentas in the event of a surprise late frost.

USDA Zone Info for Algona

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 Algona

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