The USDA Zone info is a great tool for gardeners to help us estimate 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.

In Smithville you can estimate when to plant romanesco by referring to the USDA zone info.

Planting Calendar for Romanesco

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

Since romanesco do well in moderate cold you can plant them a little earlier in the year than other frost tender plants.

The earliest that you can plant romanesco in Smithville 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 romanesco and expect a good harvest is probably September. If you wait any later than that and your romanesco may not have a chance to fully mature. Starting your romanesco indoors is a great way to get them started a few weeks earlier.

Last Frost Date

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

Since the USDA zone info for Smithville is not always accurate the actual date of last frost will vary from year to year. Since half of the time in Smithville it frosts late in the year after April 15 be ready to protect your romanesco in the event of a late frost.

USDA Zone Info for Smithville

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 Smithville

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