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

The USDA zone info for Chelsea should be used to estimate when it's possible to plant oleander.

Planting Calendar for Oleander

Frost tolerance for oleander:	Not tolerant of frost.
When to plant:	After the last frost.

It's a bad idea to plant oleander until after the last frost because they are not cold tolerant.

The earliest that you can plant oleander in Chelsea 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 oleander and expect a good harvest is probably August. If you wait any later than that and your oleander may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your oleander indoors.

Last Frost Date

The average date of last frost is April 15 in Chelsea. It might get as low as -10°F during the coldest months of winter.

Since the USDA zone info for Chelsea is an average the actual date of last frost is different every year. Half of the time in Chelsea you get a frost after April 15 so always be ready to cover your oleander if you have one of those late frosts.

USDA Zone Info for Chelsea

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Chelsea

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