One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By looking at the USDA zone info for Allegan it's possible to determine when to plant oleander.

Planting Calendar for Oleander

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

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

The earliest that you can plant oleander in Allegan 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. You probably don't want to wait any later than that or else your oleander may not have a chance to grow to maturity. If you are starting your oleander indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

In Allegan the average date of last frost happens on April 15. It might get as low as -15°F during the coldest months of winter.

Since the USDA zone info for Allegan is just an average the actual date of last frost changes from year to year. Since half of the time in Allegan it frosts late in the year after April 15 be ready to cover your oleander in the event of a surprise late frost.

USDA Zone Info for Allegan

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Allegan

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