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

The first chance to plant flowering maple in Napa should be figured out by reviewing the USDA zone info.

Planting Calendar for Flowering Maple

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

You can not plant flowering maple until after the last frost because they do not do well in cold weather.

The earliest that you can plant flowering maple in Napa 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 flowering maple and expect a good harvest is probably September. If you wait any later than that and your flowering maple may not have a chance to really do well. If you are starting your flowering maple indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Napa the average date of last frost happens on February 15. You should expect an average low temperature of 25°F in the coldest months of winter.

Since the USDA zone info for Napa is just an average the actual date of last frost is different every year. Since half of the time in Napa you get a frost after February 15 be ready to protect your flowering maple in the event of a surprise late frost.

USDA Zone Info for Napa

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 Napa

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