When to Plant Tropical Water Plants in Allentown, PA

The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The earliest that you can plant tropical water plants in Allentown should be figured out by using the USDA zone info.


Planting Calendar for Tropical Water Plants

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

Since tropical water plants are not cold tolerant you have to wait until after the last frost has passed before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant tropical water plants
Possibly ok, but a risky time to plant tropical water plants
Probably not a good time to plant tropical water plants

The earliest that you can plant tropical water plants in Allentown 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 tropical water plants and expect a good harvest is probably August. Any later than that and your tropical water plants may not have a chance to fully mature. You can get started a few weeks earlier by starting your tropical water plants indoors.

Last Frost Date

In Allentown the average date of last frost happens on April 15. You should expect an average low temperature of -5°F in the coldest months of winter.

Since the USDA zone info for Allentown is an average the actual date of last frost is different every year. Since half of the time in Allentown you get a frost after April 15 be ready to cover your tropical water plants in the event of one of those late frosts.

USDA Zone Info for Allentown

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-5°F
Highest Expected Low0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Allentown

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