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.

You can figure out when it's a good idea to plant mecardonia in San Juan by reviewing the USDA zone info.

Planting Calendar for Mecardonia

Frost tolerance for mecardonia:	Not tolerant of frost.
When to plant:	After the last frost.

Since mecardonia do not do well in cold weather it is necessary to wait until after the last frost before you can plant them.

The earliest that you can plant mecardonia in San Juan 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 mecardonia and expect a good harvest is probably September. If you wait any later than that and your mecardonia may not have a chance to fully mature. If you are starting your mecardonia indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in San Juan. In the coldest months of winter you should expect an average low temperature of 25°F.

Just be sure to remember that USDA zone info for San Juan is just an average and the actual date of last frost is different every year. Since half of the time in San Juan you get a frost after February 15 be ready to protect your mecardonia if you have 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.