One of the best tools that you have as gardeners to help us figure out 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.

One way of figuring out when it's possible to plant periwinkles is to check out the USDA zone info for Madras.

Planting Calendar for Periwinkles

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

You can not plant periwinkles until after the last frost because they require warm weather.

The earliest that you can plant periwinkles in Madras 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 periwinkles and expect a good harvest is probably August. You probably don't want to wait any later than that or else your periwinkles may not have a chance to really do well. Starting your periwinkles indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Madras. In the coldest months of winter you should expect an average low temperature of -5°F.

Just be sure to remember that USDA zone info for Madras is just an average and the actual date of last frost is different every year. Half of the time in Madras you get a frost after April 15 so make sure that you are prepared to cover your periwinkles in the event of a late frost.

USDA Zone Info for Madras

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 Madras

You may be interested in your other planting guides for Madras.