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Here is the BEST Time to Plant Cape Primrose in Illinois (2022 Guide)

Do you want to grow cape primrose in Illinois, but don’t know when to plant them?

Planting cape primrose is not as easy as it seems.

Here’s why:

  • Cape Primrose are not able to survive frost or cold weather under 50 degrees Fahrenheit.

So if you plant them outside too early in the spring they will die. And if you plant them too late, your cape primrose won’t produce a bloom.

Today, I’m going to teach you the ideal time to plant cape primrose in Illinois:

  • To Learn More About HOW to Grow Cape Primrose, Check Out This GUIDE!


When to Plant Cape Primrose in Illinois

As you may have already guessed, you need to pay very close attention to your local weather in the spring. Specifically, you are going to need to watch when the last frost occurs.

In general, when there hasn’t been a frost for two weeks, you are SAFE to plant your cape primrose outside in Illinois!

For your reference, I have created this table for average frost dates for most major cities in Illinois. If your city is not listed below you can find its Last & First Frost Dates HERE.

Illinois Last & First Frost Dates

Illinois Frost Dates

Unfortunately, Mother Nature plays cruel tricks on us every year.

It should be noted that the above dates are just averages.

There are years when the last frost comes MUCH later. Sometimes, the last frost happens much earlier and you can get your cape primrose planted outside in Illinois much quicker.

Like I said before, you need to be very diligent in checking your local weather.

So what happens if a frost comes AFTER you plant your cape primrose?

When you know a frost is coming you need to take action.

  • If cape primrose are in pots, bring them inside
  • If cape primrose are in the ground, cover them in burlap and hope they survive

Also, make sure not to plant your cape primrose in your garden too late.

  • Planting cape primrose too late will cause small blooms or even worse, no blooms.


When Should You Start Your Cape Primrose Seeds Indoors?

Depending on the type of cape primrose, it takes roughly 14-28 days (2 to 4 weeks) to grow cape primrose from seed indoors and then transplant them to your garden. And then another 6 months to bloom!

For a specific date that you should start cape primrose seeds indoors you should:

  • Find the last average frost date HERE
  • And then subtract 14 days from it

Not only this, but I recommend again paying close attention to your local weather report.

It should also be noted that the best technique for bringing your cape primrose plants outside is to introduce them (in their pots) outside for an hour. And then increase the amount of time they spend outside each day by an hour until they have been outside for 8 hours.

This will “harden” your cape primrose plant, increasing its chances of fighting off diseases, insects, droughts, and wet conditions.

If you want to learn WHEN to plant ANY Flower in Illinois, head over to HERE and just type in the flower you want to grow.

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