Which herbs survive drying and which are a waste of the jar

This is written to be used rather than admired. Each section below is a decision about fresh and dried herbs, and each one has a default.

Woody and soft behave differently

Herbs with tough stems and small firm leaves hold their aromatic compounds in a way that survives drying reasonably well. Soft leafy herbs carry their aroma in delicate volatile compounds that largely disappear when the water is removed.

That is why a dried version of a soft herb often tastes of hay rather than of the plant it came from. The division is not absolute, but it explains most of the difference between a useful jar and a disappointing one. Buying the woody ones dried and the soft ones fresh is a simple rule that gets the great majority of cases right.

Dried herbs want heat and time

Drying concentrates what remains, so a smaller quantity of dried herb is used than the fresh equivalent. The compounds are locked into dry leaf material and need heat and moisture to be released into a dish. That is why dried herbs go in early, with the cooking liquid, rather than being scattered on at the end.

At the stove, crushing them between your fingers as they go in breaks the leaf structure and helps release the aroma sooner. A dried herb added at the last moment contributes texture and very little flavour, which is why it can taste dusty.

Fresh soft herbs want neither

Soft herbs added at the beginning of a cook lose almost everything that made them worth adding. They belong at the very end, off the heat, where the residual warmth is enough to release the aroma without destroying it.

The part that matters: their stems often carry as much flavour as the leaves and can go in earlier, which is a way to use the whole bunch. Chopping them very finely a long time before serving releases the aroma into the air rather than into the dish. This is why a dish can smell wonderful during preparation and taste of very little at the table.

Jars fade and nobody notices

Dried herbs continue to lose aroma in the jar, gradually enough that the decline is never obvious from one use to the next. A jar bought for one recipe and used twice a year is almost certainly contributing colour and nothing else. The test is to crush a little and smell it, since a herb with no smell in the hand will have none in the pan.

Buying small quantities of the few you genuinely use beats a full rack bought as a set.

Heat, light and air all accelerate the fade, which is why the rack above the hob is the worst possible location.

Keeping fresh herbs alive longer

Soft herbs behave like cut flowers and keep considerably longer with their stems in water and something loose over the top. Woody herbs prefer to be wrapped loosely and kept cold, since they lose moisture rather than wilting.

Washing a bunch before storing it introduces moisture that accelerates spoilage, so it is better done at the point of use. A bunch that is about to turn can be chopped and frozen in oil or water, which preserves far more than drying it at home would. Freezing changes the texture completely, so herbs treated this way are for cooking rather than for scattering fresh.

Adjust seasoning at the end rather than trusting a quantity written by a stranger.

A shelf that reflects what you cook

Three or four dried herbs that you reach for constantly are worth more than a full rack that is mostly decorative. Growing one or two soft herbs on a windowsill removes the recurring problem of buying a whole bunch for one spoonful. Where fresh is unavailable, a dried woody herb is a reasonable substitute and a dried soft herb usually is not.

In practice, frozen and paste forms of some soft herbs preserve more than drying does and are worth trying before dismissing. Matching the shelf to the food you actually cook is the difference between a working pantry and a collection.

The takeaway

Buy woody herbs dried and soft herbs fresh, add the dried ones early and the fresh ones at the very end.

Taste it before it leaves the pan. That is most of cooking.