One of the best tools that you have as gardeners to help us determine your gardening schedule is the 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.

In Rocky River you can estimate when it's the best time to plant impatiens by referring to the USDA zone info.

Planting Calendar for Impatiens

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

You really shouldn't plant impatiens until after the last frost has passed because they do not do well in cold weather.

The earliest that you can plant impatiens in Rocky River 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 impatiens and expect a good harvest is probably August. You probably don't want to wait any later than that or else your impatiens may not have a chance to really do well. You can get started a little bit earlier by starting your impatiens indoors.

Last Frost Date

On average the last frost is on April 15 in Rocky River. It might get as low as -5°F during the coldest months of winter.

Since the USDA zone info for Rocky River may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Since half of the time in Rocky River you get surprised by a frost after April 15 be ready to cover your impatiens in the event of a surprise late frost.

USDA Zone Info for Rocky River

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Rocky River

You may be interested in your other planting guides for Rocky River.