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When to Plant Chinese cabbage in Thornton, CO

The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By referring to the USDA zone info for Thornton it's a good idea to determine when it's possible to plant chinese cabbage.

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Planting Calendar for Chinese cabbage

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

Chinese cabbage tend to make it in moderate cold which tells us that you can plant them just a bit earlier in the year than plants that are more sensitive to the cold.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant chinese cabbage
Possibly ok, but a risky time to plant chinese cabbage
Probably not a good time to plant chinese cabbage

The earliest that you can plant chinese cabbage in Thornton 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 chinese cabbage and expect a good harvest is probably September. If you wait any later than that and your chinese cabbage may not have a chance to grow to maturity. If you are starting your chinese cabbage indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost is on April 15 in Thornton. You can expect an average low temperature of -15°F in the coldest months of winter.

Just be sure to remember that the actual date of last frost is just an average because it is based on the USDA zone info for Thornton and it is different every year. Half of the time in Thornton there is a last frost after April 15 so be sure to be ready to protect your chinese cabbage if you have a late frost.

USDA Zone Info for Thornton

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 Thornton

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