Keeping herbs, such as parsley, cilantro or basil fresh until you are ready to use them is simple.
Treat herbs just as you would cut flowers!
Fill a small vase, drinking glass or mason jar with cool water and stand the herbs up in the water. Keep on the counter, changing the water as necessary if it becomes a little cloudy.
A FEW TIPS::
It is best to make sure that none of the leaves are submerged - just the stems.
If your herbs look a little wilted or tired after their journey to you, simply cut a 1/4" or so from the bottom of the stems before placing in water. This will help the water travel up to the leaves and rehydrate them.
For extended life, place the herbs in the water then place the whole thing into the refrigerator.