If you’ve ever opened a jar of honey to find it’s turned thick, grainy, or set solid, your first instinct might be to bin it. Don’t. Crystallisation is one of the clearest signs that your honey is the real thing — and understanding why it happens puts you firmly in the beekeeper’s camp.
Has my Honey Gone Off?
Every autumn, millions of people search some variation of the same question: “has my honey gone off?” They’ve opened a jar that was perfectly liquid a few weeks ago and found it transformed — grainy, pale, thick, or set like fudge. The assumption is almost always that something has gone wrong.
Nothing has gone wrong. In fact, quite the opposite.
Crystallisation is a natural, inevitable, and entirely harmless process that happens to real, unprocessed honey. If your honey has never granulated in years of sitting on the shelf, that’s worth questioning. Honey that stays liquid indefinitely has almost certainly been heat-treated to the point where the natural sugars can no longer form crystals — and that process comes at a cost.
The chemistry: glucose, fructose, and water
To understand crystallisation, you need to know what honey actually is. Raw from the hive, it’s a supersaturated solution — meaning it contains far more dissolved sugar than water can stably hold at room temperature. That instability is what drives the process.
Honey is made up of two primary sugars: glucose and fructose. Fructose is happy to stay dissolved; it’s responsible for honey’s sweetness and keeps liquid honey flowing. Glucose, on the other hand, has a much lower affinity for water. Over time, glucose molecules separate from solution and organise themselves into crystals — a process called nucleation. Once started, the crystals grow and spread through the jar.
Why does it happen faster in some honeys?
The glucose-to-fructose ratio varies significantly between flower sources. Oilseed rape honey — the basis of our Runny Honey and Soft Set — has a naturally high glucose content. Left completely unmanaged, it can granulate within days of extraction. Heather honey, by contrast, has a higher fructose ratio and a naturally thixotropic (gel-like) structure, which means it resists granulation for much longer.
Water content also plays a role. Honey with slightly higher water content — typically from early-season harvests or wetter years — crystallises more slowly. The bees’ job is to evaporate water from nectar down to roughly 17–20% before capping the honeycomb. This is why properly cured honey keeps almost indefinitely.
“If your honey has never granulated, ask yourself why. The answer usually involves heat.”
Why processed honey stays liquid
Walk down any supermarket aisle and you’ll find shelf after shelf of perfectly clear, golden, pourable honey — jars that have sat there for months without a single crystal forming. This consistency isn’t natural. It’s the result of pasteurisation: heating honey to high temperatures (typically above 70°C) and ultra-filtering it to remove the microscopic particles — pollen, beeswax, propolis — that act as nucleation sites for crystals.
The process works, in the narrow sense that it produces a stable, liquid product with a long shelf life and a uniform appearance that retailers and supermarkets prefer. But it comes at a significant cost.
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What pasteurisation destroys ✓ Naturally occurring enzymes (including diastase and invertase) that aid digestion ✓ Heat-sensitive antioxidants and polyphenols ✓ Natural antimicrobial compounds including hydrogen peroxide ✓ Pollens, which provide allergenic and nutritional benefits ✓ The complex volatile compounds that give varietal honeys their distinctive flavour |
At The Natural B, we never heat-treat our honey. It’s unpasteurised and only lightly strained to remove wax and debris while preserving pollens, enzymes, and all the rest. This means it will, eventually, granulate. And we consider that a feature, not a flaw.
If you’re using our Runny Honey and want to keep it pourable for as long as possible, a little attention to storage makes a real difference.
– Keep it at room temperature. Cooler temperatures accelerate crystallisation — the fridge is the worst place to store honey. A kitchen cupboard, pantry, or countertop away from cold draughts is ideal.
– Keep it away from sunlight. UV light degrades the natural enzymes and antioxidants, and warmth from direct sun can trigger premature fermentation in honey with higher water content.
– Seal the jar properly. Honey is hygroscopic — it absorbs moisture from the air. A loosely sealed jar in a humid kitchen will take on water, which can lower its natural resistance to spoilage.
– Don’t introduce other foods into the jar. Breadcrumbs, butter residue, or water on a knife give crystallisation something to organise around, and can introduce bacteria.
What to do if your honey has already set
If your jar of Runny Honey has already granulated — don’t throw it away. It’s perfectly good, and there are two simple options.
Option 1: use it as is
Granulated honey spreads beautifully on toast, dissolves well in warm drinks, and works perfectly in baking. Many people actually prefer the thicker consistency for certain uses. Give it a good stir with a clean, dry spoon and use it however you like.
Option 2: gently re-liquefy
Place the jar (without its lid) in a bowl of warm water — not boiling, not even close. The temperature should be comfortable to touch: around 35–40°C. Leave it for 30–60 minutes, stirring occasionally, until the crystals dissolve. Never microwave honey: the localised high temperatures destroy enzymes and can introduce hot spots that alter the flavour.
“Patience and warm water. That’s all a granulated jar needs.”
All honey from The Natural B is unpasteurised, lightly strained, and sourced from West Midlands beekeepers using traditional methods. Not suitable for children under 12 months. Store at room temperature, away from direct sunlight.