Fresh dill is easy to buy in a large bunch and difficult to use before its fine feathery leaves begin to wilt. Freezing offers a useful way to save the remainder, particularly if you regularly add dill to fish, potatoes, soups or sauces.
You don't have to blanch most culinary herbs before freezing in the same way you blanch many vegetables. However, you should start with sound clean leaves, remove unnecessary water and package them so they don't pick up freezer smells. The texture will change, so expect frozen dill to work best in cooked dishes rather than as a perfect fresh garnish.
Choose healthy fresh dill
Select a bunch with green leaves and a pleasant fresh aroma. Remove yellowed, slimy or mouldy portions.
A few slightly wilted but otherwise sound sprigs may still be useful, but freezing can't reverse a spoiled smell or decay.
If you're harvesting from the garden, pick before the plants have lost their leaf quality and move the herbs into a cool place promptly.
Wash only if needed
Rinse loose dirt off beneath gently running cold water. Spread the fine leaves carefully so grit doesn't stay trapped near the stems.
Use a clean colander or sieve. Don't wash herbs in a sink that has just been used for raw poultry.
If the dill came prewashed, follow its packaging guidance. Extra soaking isn't automatically better.
Dry the leaves thoroughly
Water left among fine dill fronds freezes into crystals that make the pieces stick together. It can also dilute the flavour in some uses.
Blot gently between clean kitchen towels or use a suitable salad spinner on a gentle setting. Avoid crushing the leaves.
Let surface droplets evaporate briefly in a clean cool area, but don't leave the herb drying in intense sun until it loses its aroma.
Decide how you'll use it
Whole sprigs work when you want to add dill to a pot and remove woody stems later. Chopped dill is more convenient for sauces and smaller portions.
If you mainly cook soups, freezing chopped dill in ice cubes may be simplest. If you garnish potato salads, separately frozen loose leaves give you more control.
Choose the method based on your meals rather than automatically making one huge block.
Freeze whole sprigs
Spread clean dry dill sprigs on a lined tray in a loose layer. Freeze until firm, then transfer into a labelled freezer-safe bag or box.
Handle gently because frozen leaves can become brittle. Don't pack them beneath heavy frozen items.
Remove only what you need and reseal quickly. The herb can go into many cooked dishes without thawing.
Freeze chopped dill
Pull leaves away from thick stems if preferred, then chop with a clean sharp knife. Work with small amounts so the herbs don't become crushed into a wet paste.
Pack measured portions into small freezer bags or containers. Press out excess air carefully without mashing the leaves.
A tablespoon-sized portion is handy if you regularly make a sauce for fish or potatoes.
Use ice-cube trays for soups
Put chopped dill into a clean freezer-safe ice-cube tray and cover with water. Freeze until solid, then transfer cubes to a labelled sealed bag.
Drop one or two cubes into soups and simmered sauces when cooking. The melting water adds a little liquid, so account for it in concentrated recipes.
These cubes are less useful when you want a dry garnish or a thick dressing.
Can you freeze dill in oil?
Some recipes freeze herbs mixed with oil in small portions. This may be useful for particular cooking tasks, but handle herb-and-oil mixtures carefully.
Do not store raw herb oils at room temperature; certain poorly handled flavoured oils can present botulism risks.
For ordinary home use, freezing in water or dry freezer packaging avoids needing a separate oil-preservation method.
Label everything clearly
Frozen chopped dill can look like fennel fronds, parsley or another green herb. Once frosty, they become difficult to distinguish.
Write the name, date and whether the portion includes water or oil. This prevents surprises when cooking.
Keep older portions near the front so you actually use them instead of adding new packets indefinitely.
Store at the correct temperature
Use a freezer operating at its recommended setting, commonly about -18°C or colder.
An overloaded warm freezer can take longer to freeze newly packed food. Arrange the packs with space for cold air.
Sealed packaging reduces freezer burn and protects delicate herbs from strong odours from other foods.
How long will flavour last?
Frozen dill is best used while its flavour remains attractive. Length of storage, packaging and the freezer's stability all affect quality.
It may remain continuously frozen while the aroma gradually weakens. A label and regular use are more helpful than pretending every packet keeps the same strength for years.
Taste a cooked dish before adding extra from an old batch; you may need to adjust seasoning.
Don't expect fresh texture after thawing
The fine fronds lose their original upright appearance after freezing. They can become limp and release moisture.
That doesn't make them useless. The flavour still suits cooked potatoes, fish pie and warm sauces.
For an attractive garnish on a cold platter, fresh dill is usually preferable.
Add directly to hot dishes
Use chopped frozen dill in a simmering soup, fish sauce or vegetable stew. The leaves thaw rapidly.
Some delicate recipes benefit from adding dill near the end so the aroma remains fresh. Follow the dish rather than boiling herbs for an hour unnecessarily.
If the packet is one solid lump, break off a suitable amount or thaw in the fridge as appropriate.
Make dill butter for later
You can prepare a flavoured butter with clean dill, following normal dairy handling and freezer packaging. Small portions can be useful for potatoes or cooked fish.
Keep the butter chilled during preparation and label any other ingredients, such as garlic or lemon.
Don't leave butter mixtures sitting warm all afternoon, especially if you're preparing them for a future occasion.
Why not just dry dill?
Drying can also preserve dill, but it changes the aroma. Frozen herbs may retain a fresher flavour in certain cooked dishes.
Drying is useful when freezer space is limited. Use a reliable herb-drying method and make sure the leaves are fully dry before closing a jar.
You can keep some of a harvest each way and decide which you prefer.
What about dill seed?
Dry mature dill seeds aren't frozen the same way as fresh leafy dill. They're normally dried thoroughly and stored as a spice.
Label seeds and leaves separately because recipes use them for different flavours and textures.
If a plant has flowered heavily, the leaves may already be past their best fresh quality.
Common mistakes
Freezing a bunch while dripping wet, leaving it uncovered on a tray for weeks and expecting thawed dill to look freshly picked are the main disappointments.
Freezing spoiled herbs is another. Start with clean sound leaves rather than trying to preserve a dying bunch.
A practical batch method
Wash if needed, dry thoroughly, chop or leave whole and freeze in small labelled portions. Move tray-frozen sprigs into sealed packaging promptly.
Use frozen dill directly in cooking and save fresh fronds for dishes where appearance matters.