You buy two bottles of gin. Both list juniper, coriander, angelica and citrus peel on the back label. One tastes sharp and dry and pine-forward, the other tastes soft and floral and almost sweet. Nothing on either label explains the gap. The botanical list is not lying to you, it is just describing the ingredients and telling you nothing about the method, and the method is where most of the difference lives.
Gin is a flavouring problem, not a fermentation problem
Whisky and rum get their character from what was fermented and how it was aged. Gin does not work that way. A gin distiller starts with neutral spirit bought in, usually from wheat or maize, already stripped of flavour. Everything you taste was added afterwards. The legal requirement is only that juniper is the dominant flavour. Beyond that, the distiller is decorating a blank surface.
That is why method matters so much here and so little elsewhere. Two distillers with the same ten botanicals and the same neutral spirit can produce gins that share almost nothing.
What the main botanicals are actually doing
Juniper carries alpha-pinene, the same compound that makes pine resin smell like pine. Most commercial juniper comes from the Balkans, Italy and Macedonia, and it is still largely harvested by hand from wild bushes, which means the crop varies year to year and the distiller has to adjust.
Coriander seed is the second botanical in almost every recipe. It contains linalool, which reads as citrus and light florals, and it is the reason many gins taste lemony without containing any lemon.
Angelica root is dry, earthy and slightly bitter, and it does a structural job. It binds the lighter aromatics and stops them evaporating away, so the gin still smells like itself an hour after pouring. Orris root, from iris rhizomes dried for years before use, does the same thing with a powdery violet note attached.
Those last two are the ones nobody notices and nobody can remove. A gin without a fixative smells bright for thirty seconds and then falls apart.
After that come the choices that make a brand recognisable. Liquorice root for body and a rounded sweetness with no sugar involved. Cassia and cinnamon for warmth. Grains of paradise for a peppery bite. Citrus peel, which behaves completely differently fresh versus dried.
Four ways to get the flavour into the spirit
Maceration and pot distillation. The botanicals steep in the spirit, sometimes for a day or more, then the whole thing is distilled. Long contact pulls out heavier, more resinous material. This is the classic route and it produces the sharpest, most assertive gins.
Vapour infusion. The botanicals sit in a basket above the liquid and the alcohol vapour passes through them on its way to the condenser. Nothing ever soaks. Bombay Sapphire is the best-known example. You get lighter, more floral, more delicate results because the heavier compounds never get extracted in the first place.
Vacuum distillation. Lower the pressure inside the still and alcohol boils at a much lower temperature, sometimes under 40 degrees. Sacred Spirits in London built their reputation on this. Delicate aromatics that would be cooked to nothing at 80 degrees survive intact, so you can distil fresh cucumber or soft herbs and have them still taste fresh.
Cold compounding. No redistillation at all: botanicals or their essences are simply mixed into the spirit. This is how most flavoured pink gins are made, and it can be done honestly or lazily. It cannot legally be called distilled gin.
London Dry is a method, not a place
London Dry gin can be made anywhere on earth. The term is a set of production rules. Everything that flavours the gin must go in during distillation, nothing may be added afterwards except water and a trace of sugar, and no colouring is permitted at all.
This is why Hendrick's is not a London Dry. Its cucumber and rose come from essences added after distillation, which is a deliberate choice, not a failure. Being outside the category costs the producer nothing except the words on the label.
The one-shot and multi-shot question
Small distilleries usually run one-shot: a batch of botanicals produces a batch of gin at final strength. Large producers often run multi-shot, distilling a heavily concentrated botanical spirit and later diluting it with more neutral spirit and water.
Multi-shot gets treated as a scandal by people selling small-batch gin. It is not. A concentrate diluted to the correct ratio is chemically the same drink. The real argument against it is that it removes the distiller's ability to adjust each run, which matters when your juniper harvest changes character every year.
When none of this is worth paying for
If your gin is going into a gin and tonic with a strong commercial tonic and a full glass of ice, most of this is money burned. Quinine and sugar and carbonation will bury a delicate vacuum-distilled gin completely. You will taste tonic. Buy a juniper-forward pot-distilled gin for that job, because it is the only kind with enough backbone to still be identifiable through the mixer.
Two more pieces of common advice that are wrong. Matching your garnish to a botanical on the label is mostly decoration; the tonic you choose changes the drink far more than a slice of grapefruit will. And tonic from a large plastic bottle that has been open three days is flat tonic, which will ruin an expensive gin more thoroughly than the wrong garnish ever could. Buy small bottles or cans and open them fresh.
The gins worth studying closely are the ones you drink with very little in them: neat, in a martini, or with soda. That is where distillation method becomes audible rather than theoretical.
