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.

By checking out the USDA zone info for Klamath Falls you should be able to figure out when you can plant alstromeria.

Planting Calendar for Alstromeria

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

Alstromeria do well in moderate cold which means that you can plant them earlier than plants that are more sensitive to the cold.

The earliest that you can plant alstromeria in Klamath Falls 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 alstromeria and expect a good harvest is probably September. If you wait any later than that and your alstromeria may not have a chance to grow to maturity. You can get started a little bit earlier by starting your alstromeria indoors.

Last Frost Date

In Klamath Falls the average date of last frost happens on April 15. In the coldest months of winter you should expect an average low temperature of -5°F.

Keep in mind that USDA zone info for Klamath Falls is an average and the actual date of last frost is different every year. Half of the time in Klamath Falls it frosts late in the year after April 15 so be sure to be ready to protect your alstromeria if you have a surprise late frost.

USDA Zone Info for Klamath Falls

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Klamath Falls

You may be interested in your other planting guides for Klamath Falls.