One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By using the USDA zone info for Trenton you should be able to estimate when it's a good idea to plant spinach.

Planting Calendar for Spinach

Frost tolerance for spinach:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Spinach tend to make it in a little bit of cold which tells us that you can plant them a little earlier in the year than other frost tender plants.

The earliest that you can plant spinach in Trenton is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant spinach and expect a good harvest is probably September. Any later than that and your spinach may not have a chance to really do well. You can get started a few weeks earlier by starting your spinach indoors.

Last Frost Date

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

Always keep in mind that USDA zone info for Trenton is an average and the actual date of last frost is different every year. Half of the time in Trenton there is a last frost after April 15 so always be ready to protect your spinach in the event of one of those late frosts.

USDA Zone Info for Trenton

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 Trenton

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