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 getting a good idea when you can plant string beans is to examine the USDA zone info for Carlsbad.

Planting Calendar for String beans

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

String beans are not cold tolerant which tells us that you need to wait until it warms up after all chance of frost has passed before you can plant them.

The earliest that you can plant string beans in Carlsbad 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 string beans and expect a good harvest is probably September. Any later than that and your string beans may not have a chance to really do well. Starting your string beans indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Carlsbad the average date of last frost happens on January 31. In the coldest months of winter you can expect an average low temperature of 30°F.

Since the USDA zone info for Carlsbad may not be accurate from year to year the actual date of last frost is different every year. Half of the time in Carlsbad you get a frost after January 31 so just be sure to be ready to cover your string beans in the event of one of those late frosts.

USDA Zone Info for Carlsbad

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 Carlsbad

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