When can I plant Tall Phlox in Evanston, IL

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

You should be able to estimate when it's the best time to plant tall phlox by referring to the USDA zone info for Evanston.


Planting Calendar for Tall Phlox

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

Tall Phlox do ok in some cold which tells us that you can plant them a little earlier in the year than plants that are more sensitive to the cold.

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

The earliest that you can plant tall phlox 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 tall phlox and expect a good harvest is probably September. You probably don't want to wait any later than that or else your tall phlox may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your tall phlox indoors.

Last Frost Date

In Evanston the average date of last frost happens on April 15. In the coldest months of winter we can expect an average low temperature of -15°F.

It's important to remember that USDA zone info for Evanston may not be accurate from year to year and our actual date of last frost can change quite a bit from year to year. Since half of the time in Evanston there is a last frost after April 15 be ready to cover your tall phlox if we have a surprise late frost.

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.