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.

One way of figuring out when you can plant primroses is to examine the USDA zone info for Smithville.

Planting Calendar for Primroses

Frost tolerance for primroses:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since primroses are one of those plants that can tolerate quite a bit of cold weather you can plant them much earlier in the year than more sensitive plants.

The earliest that you can plant primroses 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 primroses and expect a good harvest is probably September. Any later than that and your primroses may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your primroses indoors.

Last Frost Date

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

Just be sure to remember that USDA zone info for Smithville is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Smithville you get a frost after March 15 so make sure that you are prepared to protect your primroses if you have one of those late frosts.

USDA Zone Info for Smithville

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°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 20°F.

Plants to Grow in Smithville

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