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When to Plant Trailing Portulaca in Clarendon Hills, IL

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

It's possible to estimate when to plant trailing portulaca by looking at the USDA zone info for Clarendon Hills.


Planting Calendar for Trailing Portulaca

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

Since trailing portulaca are not cold tolerant it is important to wait until after the last frost before you can plant them.

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

The earliest that you can plant trailing portulaca in Clarendon Hills 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 trailing portulaca and expect a good harvest is probably August. If you wait any later than that and your trailing portulaca may not have a chance to really do well. Starting your trailing portulaca indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Clarendon Hills. In the coldest months of winter you should expect an average low temperature of -15°F.

Remember that the actual date of last frost is an average because it is based on the USDA zone info for Clarendon Hills and it changes from year to year. Half of the time in Clarendon Hills you get surprised by a frost after April 15 so make sure that you are prepared to protect your trailing portulaca if you have one of those late frosts.

USDA Zone Info for Clarendon Hills

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 Clarendon Hills

You may be interested in your other planting guides for Clarendon Hills.