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.

It's a good idea to estimate when it's possible to plant scarlet runner beans by checking out the USDA zone info for Del Mar.

Planting Calendar for Scarlet Runner Beans

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

Scarlet Runner Beans require warm weather which tells us that you must wait until it warms up after the last frost before you can plant them.

The earliest that you can plant scarlet runner beans in Del Mar 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 scarlet runner beans and expect a good harvest is probably September. You probably don't want to wait any later than that or else your scarlet runner beans may not have a chance to fully mature. Starting your scarlet runner beans indoors is a great way to get them started a few weeks earlier.

Last Frost Date

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

Since the USDA zone info for Del Mar is just an average the actual date of last frost will vary from year to year. Half of the time in Del Mar it frosts late in the year after January 31 so make sure that you are ready to cover your scarlet runner beans in the event of a late frost.

USDA Zone Info for Del Mar

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 Del Mar

You may be interested in your other planting guides for Del Mar.