The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You will be able to determine when it's a good idea to plant achimenes by looking at the USDA zone info for Monrovia.

Planting Calendar for Achimenes

Frost tolerance for achimenes:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Since achimenes require warm weather you really should wait until after the last frost before you can plant them.

The earliest that you can plant achimenes in Monrovia 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 achimenes and expect a good harvest is probably September. Any later than that and your achimenes may not have a chance to fully mature. If you are starting your achimenes indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on January 31 in Monrovia. It might get as low as 30°F during the coldest months of winter.

Keep in mind that the actual date of last frost is an average because it is based on the USDA zone info for Monrovia and it is different every year. Since half of the time in Monrovia it frosts late in the year after January 31 be ready to protect your achimenes in the event of a late frost.

USDA Zone Info for Monrovia

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 Monrovia

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