One of the best tools that you have as gardeners to help us estimate 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.

One way of figuring out when it's a good idea to plant begonias is to refer to the USDA zone info for Beaverton.

Planting Calendar for Begonias

Frost tolerance for begonias:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Since begonias do not do well in cold weather you really should wait until after the last frost before you can plant them.

The earliest that you can plant begonias in Beaverton 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 begonias and expect a good harvest is probably August. If you wait any later than that and your begonias may not have a chance to fully mature. Starting your begonias indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is March 15 in Beaverton. In the coldest months of winter you should expect an average low temperature of 15°F.

It's important to remember that USDA zone info for Beaverton is not always accurate and the actual date of last frost is different every year. Half of the time in Beaverton there is a last frost after March 15 so always be ready to protect your begonias if you have one of those late frosts.

USDA Zone Info for Beaverton

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°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 20°F.

Plants to Grow in Beaverton

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