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

In Rosenberg you can estimate when it's a good idea to plant mustard by reviewing the USDA zone info.

Planting Calendar for Mustard

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

It's a bad idea to plant mustard until after the last frost because they require warm weather.

The earliest that you can plant mustard in Rosenberg 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 mustard and expect a good harvest is probably September. You probably don't want to wait any later than that or else your mustard may not have a chance to really do well. Starting your mustard indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Rosenberg. In the coldest months of winter you can expect an average low temperature of 20°F.

Since the USDA zone info for Rosenberg is just an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Rosenberg it frosts late in the year after February 15 be ready to cover your mustard if you have one of those late frosts.

USDA Zone Info for Rosenberg

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Rosenberg

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