[header] How to store collard greens [title] Do not wash the collard greens. [step] If you plan on using your collard greens within the next week, don't wash them before refrigeration. Introducing water to the greens can promote decay, cutting the length of their freshness down dramatically. 
[substeps] If you are concerned that your greens are too dirty to store in your refrigerator, know that they will be stored in an air-tight bag. Any dirt and grit will not get onto the surfaces in your fridge.