One of the first steps you take when you are figuring out 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.

One way of making a decision about when you can plant catharanthus is to refer to the USDA zone info for Lynn.

Planting Calendar for Catharanthus

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

Since catharanthus are not cold tolerant it's necessary to wait until after the last frost has passed before you can plant them.

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

Last Frost Date

On average the last frost has passed is on April 15 in Lynn. In the coldest months of winter you can expect an average low temperature of -5°F.

It's important to remember that USDA zone info for Lynn is an average and the actual date of last frost will vary from year to year. Since half of the time in Lynn you get surprised by a frost after April 15 be ready to cover your catharanthus in the event of one of those late frosts.

USDA Zone Info for Lynn

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 Lynn

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