How To Store Kale for Weeks
First things first, DO NOT under any circumstance wash your kale before storing it. I see this a lot on many different websites and it s a no-no. Kale is super fragile, despite its heartiness. And because of all the grooves some varieties have, it is impossible to get it dry enough. So just don’t bother. Washing it before storage will only increase spoilage.
Only wash your kale right before using it.
Now, you want to store kale in the refrigerator (duh!) but in the coldest part of the fridge. Kale tends to get more and more bitter the longer it is left at room temperature, so keep it cool, sucka’!
I tightly wrap my kale in a paper towel and then place in an air-tight bag. Now, since kale bunches tend to be rather large, that is not always possible. Just get the bag as air-tight as you can.
Also, do not de-stem it. Kale is very sensitive. You only want to cut it and wash it prior to use (have I said that enough yet). It is also sensitive to other produce. kale is very sensitive to ethylene, formed naturally from certain other produce, so store it away from those items.
Here are some fruits and veggies that you should not store near your kale: