When can I plant Diascia in Evanston, IL

Before planting it is a good idea to find our USDA Zone info to estimate our garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

In Evanston you can figure out when you can plant diascia by reviewing the USDA zone info.


Planting Calendar for Diascia

Frost tolerance for diascia: Tolerant of some frost.
When you should plant them: Up to 5 weeks before last frost.

You can plant diascia a bit earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

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

The earliest that you can plant diascia in Evanston 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 diascia and expect a good harvest is probably September. Any later than that and your diascia may not have a chance to really do well. Starting your diascia indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Evanston. In the coldest months of winter we can expect an average low temperature of -15°F.

Remember that our actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Evanston and it changes from year to year. Half of the time in Evanston last frost occurs after April 15 so make sure that you are ready to cover your diascia if we have one of those late frosts.

USDA Zone Info for Evanston

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 Evanston

You may be interested in our other planting guides for Evanston.