Traditional methods of preserving dill include gathering several bundles and hanging them to dry. Although this is the preferred method for dill to be used in pickling, it is not the only method of preservation. Freezing is gaining popularity due to the ease of preparation and use, particularly if dill is to be used as a seasoning for fresh soups and sauces. According to Joanne Austin, from Washington State University, freezing also locks in flavor.
Harvest dill before it blossoms for best flavor. Pick in the morning when it is at its freshest by clipping the sprigs of dill weed close to the main stem of the plant.
Rinse the sprigs of dill under cold water to remove insects or garden soil.
Grasp the dill sprigs with a set of tongs and dip them into the water to blanch. Allow them to boil for a moment or two until the dill changes color. Blanching stops the enzymes responsible for maturing and preserves both the appearance and flavor.
Remove the sprigs and cool them under cold running water or by placing them in a bowl of ice water. This cools the dill quickly, preventing it from continuing to cook.
Blot the dill dry with a paper towel.
Place the dill in freezer bags and and seal securely. Force out excess air as you seal the bag to avoid freezer burn.
Remove the dill whenever needed and chop it to add to sauces or other recipes.