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 Smithfield you can determine when it's possible to plant plectranthus by referring to the USDA zone info.

Planting Calendar for Plectranthus

Frost tolerance for plectranthus:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

It's not a good idea to plant plectranthus until after the last frost because they require warm weather.

The earliest that you can plant plectranthus in Smithfield 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 plectranthus and expect a good harvest is probably August. If you wait any later than that and your plectranthus may not have a chance to really do well. You can get started a couple of weeks earlier by starting your plectranthus indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on March 15 in Smithfield. You should expect an average low temperature of 10°F in the coldest months of winter.

Since the USDA zone info for Smithfield is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Smithfield you get a frost after March 15 so make sure that you are prepared to protect your plectranthus in the event of a surprise late frost.

USDA Zone Info for Smithfield

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Smithfield

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