The USDA Zone info is a great tool for gardeners to help us figure out 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 determining when it's possible to plant tropical water plants is to check out the USDA zone info for Potsdam.

Planting Calendar for Tropical Water Plants

Frost tolerance for tropical water plants:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Since tropical water plants do not do well in cold weather it's necessary to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant tropical water plants in Potsdam is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant tropical water plants and expect a good harvest is probably August. If you wait any later than that and your tropical water plants may not have a chance to really do well. You can get started a few weeks earlier by starting your tropical water plants indoors.

Last Frost Date

The average date of last frost is May 15 in Potsdam. You should expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Potsdam is just an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Potsdam there is a last frost after May 15 be ready to cover your tropical water plants if you have one of those late frosts.

USDA Zone Info for Potsdam

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 Potsdam

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