One of the best tools that you have as gardeners to help us estimate your gardening schedule is the 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.

By reviewing the USDA zone info for San Mateo you will be able to estimate when you can plant oleander.

Planting Calendar for Oleander

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

Since oleander do not do well in cold weather you need to wait until after the last frost has passed before you can plant them.

The earliest that you can plant oleander in San Mateo is February. However, you really should wait until March 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. You probably don't want to wait any later than that or else your oleander may not have a chance to grow to maturity. You can get started a little bit earlier by starting your oleander indoors.

Last Frost Date

The average date of last frost is January 31 in San Mateo. You can expect an average low temperature of 30°F in the coldest months of winter.

Since the USDA zone info for San Mateo is just an average the actual date of last frost will vary from year to year. Half of the time in San Mateo last frost occurs after January 31 so just be sure to be ready to protect your oleander if you have one of those late frosts.

USDA Zone Info for San Mateo

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in San Mateo

You may be interested in your other planting guides for San Mateo.