Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In London you can figure out when it's a good idea to plant lemon grass by looking at 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.

Lemon grass tend to make it in very little cold which tells us that you can plant them slightly earlier in the year than other frost tender plants.

The earliest that you can plant lemon grass in London 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. Any later than that and your lemon grass may not have a chance to fully mature. You can get started a few weeks earlier by starting your lemon grass indoors.

Last Frost Date

The average date of last frost is April 15 in London. You should expect an average low temperature of -5°F in the coldest months of winter.

Keep in mind that USDA zone info for London may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in London you get surprised by a frost after April 15 so make sure that you are prepared to cover your lemon grass if you have a late frost.

USDA Zone Info for London

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 London

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