Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of figuring out when you can plant polka dot plant is to use the USDA zone info for Zone 4b.

Planting Calendar for Polka Dot Plant

Frost tolerance for polka dot plant:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

It's probably a bad idea to plant polka dot plant until after the last frost because they do not do well in cold weather.

The earliest that you can plant polka dot plant in Zone 4b is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant polka dot plant and expect a good harvest is probably August. Any later than that and your polka dot plant may not have a chance to fully mature. Starting your polka dot plant indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on May 15 in Zone 4b. You can expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Zone 4b is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Zone 4b it frosts late in the year after May 15 so make sure that you are prepared to protect your polka dot plant if you have one of those late frosts.

USDA Zone Info for Zone 4b

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Zone 4b

You may be interested in your other planting guides for Zone 4b.