Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The best time to plant hibiscus in Vernal should be estimated by using the USDA zone info.

Planting Calendar for Hibiscus

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

Since hibiscus are not cold tolerant it is important to wait until after the last frost has passed before you can plant them.

The earliest that you can plant hibiscus in Vernal 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 hibiscus and expect a good harvest is probably August. You probably don't want to wait any later than that or else your hibiscus may not have a chance to really do well. You can get started a couple of weeks earlier by starting your hibiscus indoors.

Last Frost Date

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

Keep in mind that USDA zone info for Vernal may not be accurate from year to year and the actual date of last frost will vary from year to year. Since half of the time in Vernal you get a frost after April 15 be ready to protect your hibiscus in the event of a late frost.

USDA Zone Info for Vernal

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 Vernal

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