Before planting it is a good idea to find your USDA Zone info to figure out 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 Winona you can determine when it's the best time to plant california poppy by reviewing the USDA zone info.

Planting Calendar for California Poppy

Frost tolerance for california poppy:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

California Poppy can survive in mild cold which tells us that you can plant them just a tiny bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant california poppy in Winona 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 california poppy and expect a good harvest is probably August. If you wait any later than that and your california poppy may not have a chance to fully mature. If you are starting your california poppy indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

In Winona the average date of last frost happens on May 15. You can expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Winona is an average the actual date of last frost is different every year. Since half of the time in Winona you get a frost after May 15 be ready to protect your california poppy if you have a late frost.

USDA Zone Info for Winona

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 Winona

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