Fresh basil smells wonderful when you bring it home, but it can look miserable surprisingly quickly. One day it is a bright green bunch ready for pasta; the next, half the leaves have darkened and wilted. The problem is often storage rather than the herb itself.
Basil is more sensitive to chilling than parsley or coriander, so the usual advice to throw every herb straight into the coldest fridge drawer doesn't always give the best result. The right approach depends on whether you have cut stems, loose leaves, a living pot or more basil than you can use soon.
Start by checking its condition
Look over the bunch before storing it. Fresh leaves should be reasonably firm and aromatic, without extensive slimy patches, blackened tissue or an unpleasant smell.
Remove visibly decaying leaves so they don't sit pressed against sound ones. A few mechanical bruises are different from widespread wet rot, but spoiled basil will not recover through clever storage.
If buying a supermarket pot, inspect the compost and stems. A crowded pot that is already collapsing at the base may be harder to keep alive than a healthy bunch of cut stems.
Treat cut basil a little like flowers
Utah State University Extension recommends recutting the stems and placing fresh basil in a jar of water away from direct sunlight.
Trim a small amount from the bottom of each stem with clean scissors or a knife. Put the cut ends into clean drinking water while keeping most of the leaves out of the jar.
Use a stable container that won't tip over on the kitchen worktop. Change water if it becomes cloudy and remove any stems that begin to spoil.
Choose a sensible spot
A bright kitchen can be convenient, but direct strong sunlight can heat the jar and wilt cut leaves. Keep it away from radiators, hot ovens and draughty window ledges.
Basil generally prefers mild conditions rather than the chilly environment that suits many other herbs. If the kitchen is especially hot, your storage choices may need adjusting.
Don't leave the jar right beside raw meat preparation, dirty dishes or sprays. You want the herb easily accessible without exposing it to unnecessary kitchen contamination.
Should basil go in the fridge?
Advice varies with the variety, packaging and temperature. Basil is a tropical herb and can darken when stored too cold. That is why a cut bunch sometimes looks worse after a night in a chilly fridge.
Utah State University Extension suggests a jar of water and, for longer storage, covering the stems with a bag and refrigerating. That method can work, but refrigerator temperature and exposure make a difference.
If you try refrigerated storage, protect leaves from the coldest contact areas, use the extension method carefully and inspect the herb regularly. A room-temperature jar may be preferable for a short stay in a cool kitchen.
Protect the leaves without trapping moisture
Loose plastic wrapped tightly around wet basil can trap condensation. That can produce a slippery mess even if the herb is still relatively fresh.
If covering a jar, use a loose bag or cover that doesn't crush the leaf tops. Keep the foliage mostly dry and allow enough space to avoid pressure damage.
Do not wash a whole bunch and pack it dripping wet in a sealed bag. Extra surface moisture usually makes storage harder, not easier.
When should you wash basil?
Wash leaves under cool running water shortly before using them, unless the product instructions say otherwise. Shake or pat gently dry.
Basil leaves bruise easily. A hard spray, aggressive rubbing or a heavy salad spinner can damage them and lead to dark marks.
For pesto, washing and drying properly before blending avoids diluting the sauce. For a garnish, a gentle rinse just before serving preserves the fresh appearance.
Store loose basil leaves carefully
Leaves detached from their stems have fewer options for keeping fresh. Put them in a clean container with a suitable dry lining if needed, taking care not to crush them.
Use them relatively quickly. Detached leaves are more fragile than sound stems and can discolour if left wet or exposed to cold.
If you bought a small plastic punnet, check its label. Some packaged herbs are supplied under particular conditions and should be stored as directed.
What about a living basil plant?
A basil plant in a pot is not the same thing as cut herbs. It needs light, water, drainage and enough space for its roots.
Supermarket basil pots are often densely planted, which makes them dry out quickly and compete for resources. You can carefully divide healthy plants into suitable pots if you have the space and growing conditions.
Keep potting compost moist but not permanently waterlogged. A pot left sitting in a tray full of water can develop root problems despite the lush green foliage above.
Harvest leaves without destroying the plant
When picking from a living plant, take shoots above a pair of healthy leaves rather than stripping every leaf from one stem. This encourages branching on many common basil varieties.
Avoid removing most of the foliage at once. The plant needs leaves to keep growing and may struggle if repeatedly cut back too hard.
If flowers begin forming and you want leafy growth, pinching them out can help, depending on the variety and growing goal.
Freezing surplus basil
Freezing is useful if you have far more basil than you can use fresh. Utah State University Extension notes that frozen basil can lose its attractive fresh texture.
Chopped basil frozen in small portions or incorporated into pesto is often more convenient for cooking than trying to thaw perfect whole garnish leaves.
Use clean freezer-safe containers and label them. Basil mixed into oil or pesto needs proper cold storage and food-safety handling; don't leave homemade herb-in-oil mixtures unrefrigerated.
Can you dry it instead?
Basil can be dried, though its flavour is different from fresh. Gather clean sound leaves and use a method designed for drying herbs.
Keep drying herbs away from dust, pests and damp conditions, and don't pack them away until completely dry. Moisture trapped in a jar can encourage mould.
Dried basil suits tomato sauces and slow-cooked meals. Fresh basil is usually more distinctive when added at the end of cooking.
When to discard basil
Black spots caused by bruising or chilling may be mainly a quality issue, but slimy rot, visible mould and unpleasant odour are reasons to discard affected material.
Do not stir rotten herbs into hot pasta believing cooking will make them fresh again. Decay and ordinary wilting are different problems.
Inspect any bunch that has stood in stagnant water for days. Replace water and use sound leaves promptly rather than stretching storage past reason.
What to do when the leaves wilt
If stems are sound but leaves look slightly droopy, recut the stem bases and place them into fresh water. Some bunches perk up when water uptake improves.
If leaves have turned black or become mushy, they are unlikely to recover. At that point, keep only sound portions suitable for immediate use.
Try not to solve every wilted bunch with the fridge. Check whether heat, lack of stem water or rough handling caused the problem.
A practical kitchen routine
For cut basil, recut the stems, stand them in fresh water and keep the jar away from hot direct sunshine. Inspect and use the herb while it is fragrant and healthy.
For longer storage, follow a suitable protected refrigeration method if it works with your conditions, or freeze portions for cooked dishes. The point is to choose the method for the basil you have, not automatically give it the same treatment as a bag of lettuce.