Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You will be able to figure out when it's the best time to plant oleander by looking at the USDA zone info for Modesto.

Planting Calendar for Oleander

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

Since oleander are not cold tolerant you have to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant oleander in Modesto is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant oleander and expect a good harvest is probably September. If you wait 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 little bit earlier.

Last Frost Date

In Modesto the average date of last frost happens on February 15. In the coldest months of winter you can expect an average low temperature of 25°F.

Just be sure to remember that USDA zone info for Modesto is an average and the actual date of last frost changes from year to year. Half of the time in Modesto you get surprised by a frost after February 15 so always be ready to protect your oleander in the event of a late frost.

USDA Zone Info for Modesto

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Modesto

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