The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By checking out the USDA zone info for Oak Brook it's a good idea to estimate when to plant stevia.

Planting Calendar for Stevia

Frost tolerance for stevia:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Since stevia require warm weather it's important to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant stevia in Oak Brook 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 stevia and expect a good harvest is probably August. If you wait any later than that and your stevia may not have a chance to grow to maturity. Starting your stevia 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 Oak Brook. It might get as low as -15°F during the coldest months of winter.

Remember that USDA zone info for Oak Brook may not be accurate from year to year and the actual date of last frost changes from year to year. Half of the time in Oak Brook there is a last frost after April 15 so make sure that you are ready to protect your stevia in the event of a late frost.

USDA Zone Info for Oak Brook

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 Oak Brook

You may be interested in your other planting guides for Oak Brook.