The Legend of the Last Brewers

Few drinks carry a better story than heather ale. The version most people meet first is the one in Robert Louis Stevenson's 1890 poem: a Pictish king and his son are the last two men alive who know the recipe, and they take the secret to the grave rather than surrender it to invaders. It is a fine piece of Victorian verse, and like most good legends it has grown a few layers over the years — earlier tellings move the action to Ireland, to Norway, to a cliff edge on the west coast, and to a brewer who would rather die than speak.

What matters for a home brewer is not whether the story is literally true. It is that the story exists at all, and that it attached itself so firmly to a drink made from a plant that grows across every moor in the country.

What the Records Actually Say

Documentary evidence for a continuous, unbroken Pictish brewing tradition is thin. That does not mean heather was not used — it means nobody wrote it down. Brewing in early Scotland was a domestic and monastic affair, done in the house, from whatever grain was to hand, flavoured with whatever grew nearby.

What survives is suggestive rather than conclusive:

• Passing references in medieval and early modern sources to ale flavoured with heather, often alongside other wild plants.
• Pollen records and excavation evidence showing heather, bog myrtle and yarrow growing in the immediate landscape of settlement sites.
• Local and court records that mention heather ale as something made and sold in the Highlands and the north east.
• Much better-documented gruit brewing traditions across northern Europe, where hops were a late arrival.

The honest summary is that heather ale was probably never one recipe. It was a family of drinks, made wherever the plants grew.

Before Hops: Scotland's Wild Gruit

Hops only became the default bittering and preserving agent in British brewing gradually, through the sixteenth and seventeenth centuries, and in some Scottish households considerably later. Before that, brewers used a mixture of bitter and aromatic plants — a gruit — and the Scottish larder offered plenty:

• Bog myrtle (Myrica gale), also called sweet gale, the workhorse of northern gruit. Resinous, slightly astringent, with a scent somewhere between eucalyptus and sage.
• Yarrow, bitter and earthy, used medicinally and in ale.
• Meadowsweet, which adds a soft floral note and a mild preservative effect.
• Juniper berries, pine tips and spruce tips, giving a sharp, resinous edge.
• Mugwort, ground ivy and wild rosemary, all recorded in old ale recipes.
• Heather, particularly ling, used for flavour, colour and a gentle bitterness.

These were not simply substitutes for hops. They represent a different way of thinking about what beer should taste like.

Heather in the Brewhouse: A Working Method

Heather brings three things to a brew: a floral, honeyed, faintly medicinal aroma; a soft, drying bitterness; and a slight earthy, smoky note from the tips. It will not bitter a beer on its own the way hops do, so most home brewers use a modest hop addition for structure and let heather do the aromatic work.

A reliable starting point for a 20 litre batch:

• Bitter with a neutral hop to around 20–25 IBUs, added at the start of the boil.
• Add 30–50 g of dried flowering heather tips with 10–15 minutes left in the boil.
• Optionally add a further 15–20 g at flameout or during chilling for a brighter aroma.
• If using bog myrtle, be cautious: 10–15 g per 20 litres is plenty. More and it takes over the whole beer.
• Keep the grain bill simple — pale malt with a touch of crystal — so the heather is not fighting anything.
• Ferment with a clean ale yeast at 18–20°C; a Scottish ale strain suits the style well.

Fresh heather can be used, but you need roughly double the weight and the results vary more from batch to batch.

Foraging Heather and Bog Myrtle

Pick ling heather in late summer, when the flowers are fully open but before they brown — usually August into early September, later in the far north. Take the top few centimetres of flowering growth, not the woody stems. Bell heather flowers earlier and gives a sharper, more perfumed aroma; both are worth trying and blending.

In Scotland, the Land Reform (Scotland) Act 2003 gives a right of responsible access, which covers picking wild flowers for personal use. Do not dig up plants, do not strip a single patch bare, and avoid Sites of Special Scientific Interest and nature reserves where collection may be restricted.

Dry your harvest in a warm, airy room, spread thinly on newspaper, then store it in paper bags in a dark cupboard. It holds its aroma well for about a year.

Brewing Your First Heather Ale

Start small. A five litre trial batch costs you very little and teaches you more than any recipe. Split it — half with heather only, half with heather and a small charge of bog myrtle — then taste both side by side once conditioned.

Keep notes on weight, timing and where the heather came from. Moorland heather varies enormously from one hillside to the next, and that variation is part of the pleasure of brewing with it.