One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Humboldt can be used to figure out when it's possible to plant mustard.

Planting Calendar for Mustard

Frost tolerance for mustard:	Not tolerant of frost.
When to plant:	After the last frost has passed.

You really shouldn't plant mustard until after the last frost when the weather gets warmer because they are not cold tolerant.

The earliest that you can plant mustard in Humboldt 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 really do well. Starting your mustard indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Humboldt. In the coldest months of winter you should expect an average low temperature of 0°F.

It's important to remember that USDA zone info for Humboldt is just an average and the actual date of last frost is different every year. Half of the time in Humboldt you get surprised by a frost after April 15 so make sure that you are ready to protect your mustard in the event of one of those late frosts.

USDA Zone Info for Humboldt

Here is the info for USDA Zone 7a.

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

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

Plants to Grow in Humboldt

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