The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for La Grange Park can be looked at to determine when you can plant helianthemum.

Planting Calendar for Helianthemum

Frost tolerance for helianthemum:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Helianthemum are moderately cold tolerant which tells us that you can get them planted earlier than other frost tender plants.

The earliest that you can plant helianthemum in La Grange Park 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 helianthemum and expect a good harvest is probably September. Any later than that and your helianthemum may not have a chance to grow to maturity. If you are starting your helianthemum indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

On average all chance of frost has passed is on April 15 in La Grange Park. In the coldest months of winter you should expect an average low temperature of -15°F.

Remember that USDA zone info for La Grange Park may not be accurate from year to year and the actual date of last frost will vary from year to year. Since half of the time in La Grange Park you get a frost after April 15 be ready to protect your helianthemum if you have a surprise late frost.

USDA Zone Info for La Grange Park

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 La Grange Park

You may be interested in your other planting guides for La Grange Park.