One of the first steps you take when you are estimating your gardening schedule is find your USDA Zone info. 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 Williston it's possible to figure out when it's possible to plant torch lilys.

Planting Calendar for Torch Lilys

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

Torch Lilys are very cold tolerant which tells us that you can plant them much earlier than other frost tender plants.

The earliest that you can plant torch lilys in Williston is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant torch lilys and expect a good harvest is probably August. Any later than that and your torch lilys may not have a chance to fully mature. You can get started a few weeks earlier by starting your torch lilys indoors.

Last Frost Date

In Williston the average date of last frost happens on May 15. It might get as low as -30°F during the coldest months of winter.

It's important to remember that the actual date of last frost is just an average because it is based on the USDA zone info for Williston and it can change quite a bit from year to year. Half of the time in Williston there is a last frost after May 15 so make sure that you are prepared to cover your torch lilys in the event of a late frost.

USDA Zone Info for Williston

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Williston

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