Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The best time to plant lemon grass in Thornton can be estimated by using the USDA zone info.

Planting Calendar for Lemon grass

Frost tolerance for lemon grass:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Since lemon grass do ok in moderate cold you can plant them slightly earlier in the year than more sensitive plants.

The earliest that you can plant lemon grass in Thornton 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 lemon grass and expect a good harvest is probably August. You probably don't want to wait any later than that or else your lemon grass may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your lemon grass indoors.

Last Frost Date

On average the last frost is on April 15 in Thornton. You should expect an average low temperature of -15°F in the coldest months of winter.

Keep in mind that USDA zone info for Thornton may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Since half of the time in Thornton last frost occurs after April 15 be ready to cover your lemon grass if you have one of those late frosts.

USDA Zone Info for Thornton

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Thornton

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