The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Chelsea you can estimate when to plant mustard by referring to the USDA zone info.

Planting Calendar for Mustard

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

Mustard require warm weather which means that it is important to wait until it warms up after the last frost has passed before you can plant them.

The earliest that you can plant mustard in Chelsea is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant mustard and expect a good harvest is probably August. If you wait any later than that and your mustard may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your mustard indoors.

Last Frost Date

In Chelsea the average date of last frost happens on April 15. It might get as low as -5°F during the coldest months of winter.

It's important to remember that the actual date of last frost is just an average because it is based on the USDA zone info for Chelsea and it changes from year to year. Half of the time in Chelsea you get surprised by a frost after April 15 so make sure that you are ready to cover your mustard if you have a surprise late frost.

USDA Zone Info for Chelsea

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 Chelsea

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