Place chervil stems in a glass of water, like a bouquet of flowers, and store in the refrigerator for up to a week.
Alternatively, wrap chervil in a damp paper towel, place in a sealed plastic bag and store in fridge for up to 5 days.
Chervil is particularly fragile and its flavor is easily lost when dried or when in contact with too much heat.
Soaking chervil in white wine vinegar is your best option for preserving this delicate herb’s flavor for more than one week.