One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Katy should be reviewed to figure out when it's a good idea to plant achimenes.

Planting Calendar for Achimenes

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

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

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

Last Frost Date

The average date of last frost is February 15 in Katy. You can expect an average low temperature of 20°F in the coldest months of winter.

Keep in mind that USDA zone info for Katy is an average and the actual date of last frost will vary from year to year. Since half of the time in Katy it frosts late in the year after February 15 be ready to cover your achimenes if you have a surprise late frost.

USDA Zone Info for Katy

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Katy

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