Before planting it is a good idea to find your USDA Zone info to estimate 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.

In Riverton you can figure out when to plant iceland poppy by referring to the USDA zone info.

Planting Calendar for Iceland Poppy

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

Since iceland poppy are one of those plants that can tolerate a little bit of cold weather you can plant them just a bit earlier in the year than other frost tender plants.

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

Last Frost Date

On average the last frost when the weather gets warmer is on May 15 in Riverton. You should expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Riverton is not always accurate the actual date of last frost is different every year. Half of the time in Riverton it frosts late in the year after May 15 so make sure that you are prepared to cover your iceland poppy if you have one of those late frosts.

USDA Zone Info for Riverton

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Riverton

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