While they are destined for pesto, salad dressing, or whatever cuisine you are preparing to satisfy your appetite, how can you keep them fresh for a long time?
If you want to maximize their lifespan, there is one thing you can do: wrap them in a towel.
Moisture regulation is essential to the long-term viability of herbs. Herbs with woody stems, like rosemary and thyme, are hardy and should be stored in a dry place.
In order to prevent wilting, delicate herbs like parsley and chives, which are more delicate as a whole, are advised to be maintained damp at all times.
Spread the herbs on a barely moist cloth, roll into a bundle, place the bundle in a bag, and refrigerate it.
When placed in a glass, jar, or quart container with an inch or so of water and refrigerated and covered, fragile herbs may remain longer.
Every day or so, check on the herbs to see if any have gone bad and damp the towel if it is entirely dry. This will help extend the life of the herbs.
Leaving a small amount of space around the herbs allows them to breathe, so don't be too concerned about entirely sealing the bags while storing.