When can I plant Oleander in Zone 1b

One of the first steps we take when we are determining our gardening schedule is find our USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

By reviewing the USDA zone info for Zone 1b it's possible to figure out when it's the best time to plant oleander.


Planting Calendar for Oleander

Frost tolerance for oleander: Not tolerant of frost.
When you should plant them: After all chance of frost has passed.

Oleander are not cold tolerant which tells us that it is necessary to wait until it warms up after the last frost before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant oleander
Possibly ok, but a risky time to plant oleander
Probably not a good time to plant oleander

The earliest that you can plant oleander in Zone 1b is June. However, you really should wait until July if you don't want to take any chances.

The last month that you can plant oleander and expect a good harvest is probably July. Any later than that and your oleander may not have a chance to fully mature. If you are starting your oleander indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Zone 1b the average date of last frost happens on June 15. We can expect an average low temperature of -55°F in the coldest months of winter.

Remember that USDA zone info for Zone 1b is not always accurate and our actual date of last frost changes from year to year. Since half of the time in Zone 1b there is a last frost after June 15 be ready to cover your oleander in the event of one of those late frosts.

USDA Zone Info for Zone 1b

Here is the info for USDA Zone 1b.

Average Date of Last Frost (spring)June 15
Average Date of First Frost (fall)July 15
Lowest Expected Low-55°F
Highest Expected Low-50°F

This means that on a really cold year, the coldest it will get is -55°F. On most years you should be prepared to experience lows near -50°F.

Plants to Grow in Zone 1b

You may be interested in our other planting guides for Zone 1b.