One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of getting a good idea when it's the best time to plant dill is to look at the USDA zone info for Prospect Heights.

Planting Calendar for Dill

Frost tolerance for dill:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Dill can survive in mild cold which tells us that you can plant them slightly earlier in the year than other frost tender plants.

The earliest that you can plant dill in Prospect Heights is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant dill and expect a good harvest is probably August. If you wait any later than that and your dill may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your dill indoors.

Last Frost Date

On average the last frost is on April 15 in Prospect Heights. In the coldest months of winter you should expect an average low temperature of -15°F.

Keep in mind that USDA zone info for Prospect Heights may not be accurate from year to year and the actual date of last frost is different every year. Since half of the time in Prospect Heights there is a last frost after April 15 be ready to protect your dill in the event of a surprise late frost.

USDA Zone Info for Prospect Heights

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 Prospect Heights

You may be interested in your other planting guides for Prospect Heights.