One of the first steps you take when you are getting a good idea 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.

It's possible to estimate when you can plant alstromeria by looking at the USDA zone info for Donaldsonville.

Planting Calendar for Alstromeria

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

Alstromeria are one of those plants that can tolerate a little bit of cold weather which means that you can plant them earlier than other frost tender plants.

The earliest that you can plant alstromeria in Donaldsonville 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 alstromeria and expect a good harvest is probably October. Any later than that and your alstromeria may not have a chance to grow to maturity. If you are starting your alstromeria 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 Donaldsonville. In the coldest months of winter you should expect an average low temperature of 20°F.

Since the USDA zone info for Donaldsonville may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Since half of the time in Donaldsonville it frosts late in the year after February 15 be ready to protect your alstromeria in the event of a surprise late frost.

USDA Zone Info for Donaldsonville

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 Donaldsonville

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