One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for San Juan should be read to figure out when you can plant gypsophila.

Planting Calendar for Gypsophila

Frost tolerance for gypsophila:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

You can plant gypsophila a little bit earlier in the year because they do well in moderate cold.

The earliest that you can plant gypsophila in San Juan is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant gypsophila and expect a good harvest is probably October. Any later than that and your gypsophila may not have a chance to grow to maturity. Starting your gypsophila indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost is on February 15 in San Juan. You should expect an average low temperature of 25°F in the coldest months of winter.

Since the USDA zone info for San Juan is not always accurate the actual date of last frost will vary from year to year. Half of the time in San Juan last frost occurs after February 15 so make sure that you are prepared to protect your gypsophila in the event of one of those late frosts.

USDA Zone Info for San Juan

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 San Juan

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