Alpine rose honey

Delicate and short: a faint woody, floral and fresh-fruit aroma, medium sweetness, low acidity and no bitterness.

MonofloralDelicateFloralWoodyFruity

Miele di rododendro · Alpenrosenhonig · miel de rhododendron

A pale, gentle honey from the dwarf rhododendrons that carpet the high pastures of the Alps and Pyrenees above the tree line. It is the other rhododendron honey — not the Black Sea mad honey, from different species — and it is one of the fifteen types the European reference descriptions were written for. It can only be made by carrying hives up the mountain for a few summer weeks, the crop is uncertain from year to year, and most of it is sold in the valleys where it is made.

Flavour and aroma

Aroma: faint wood, wild flowers, fresh fruit
Flavour: gentle sweetness, a light fruity note, a touch of warmth
Finish: Short.
Intensity: Delicate
Sweetness: Sweet
Bitterness: None
Acidity: Low

Colour, texture and crystallisation

Colour

Extra white (8-17 mm Pfund)White (17-34 mm Pfund)

Very pale — the European reference samples averaged 12.4 mm on the Pfund scale, among the palest of all the types described.

On setting: Sets to a pale, fine-to-medium cream.

Texture

Runny; Soft set

Crystallisation

Moderate — granulates over a few months

Fructose outweighs glucose (a fructose-to-glucose ratio around 1.3 in the European reference samples) and the glucose-to-water ratio sits near 1.8, which puts it between the fast-setting and the long-liquid honeys — panels describe its crystallisation as moderate.

Typical composition

Moisture: 15–18.5% (typically 16.6%)
Fructose: 35–43.3% (typically 39.1%)
Glucose: 26–34.8% (typically 30.4%)
Glucose-to-fructose ratio: 0.67–0.92 (typically 0.78)
pH: 3.7–4.2 (typically 3.9)
Electrical conductivity: 0.14–0.34 mS/cm (typically 0.23 mS/cm)

Ranges are the 95% limits of the European reference samples; the glucose-to-fructose ratio is derived from the mean sugar values and the ratio limits reported there.

What these mean: the sugars and the ratio · moisture · conductivity · how each is measured

What laboratories and tasting panels measured

From the European reference description of Rhododendron (alpine rose) honey: 139 authentic samples pooled by the International Honey Commission. These describe a population of honeys, not this or any particular jar — the standard deviations and sample counts are here so that no mean is mistaken for a specification.

Rhododendron (alpine rose) honey: laboratory reference values
Parameter	Mean	Standard deviation	Limits	Samples
Pollen of the named plant% of pollen grains	38.6	± 19.5	15 to 77.3	85
Colourmm Pfund	12.4	± 4	11 to 20.4	74
Electrical conductivitymS/cm	0.23	± 0.06	0.14 to 0.34	125
Specific rotation[α]D20	-5.8	± 2.4	-10.6 to -1.7	76
pHpH	3.9	± 0.2	3.7 to 4.2	91
Free aciditymeq/kg	13.3	± 3.3	6.8 to 19.9	84
Lactonesmeq/kg	1.2	± 1.2	0 to 3.6	77
Total aciditymeq/kg	14.8	± 3.4	8 to 21.7	77
Waterg/100 g	16.6	± 0.9	15 to 18.5	38
Diastase activitySchade units (DN)	12.1	± 2.3	7.4 to 16.7	75
Invertase activityU/kg	79.6	± 21.1	37.2 to 121.9	52
Prolinemg/kg	264	± 35	208 to 327	16
Fructoseg/100 g	39.1	± 2.1	35 to 43.3	107
Glucoseg/100 g	30.4	± 2.2	26 to 34.8	106
Sucroseg/100 g	0.6	± 0.9	0 to 2.4	99
Fructose + glucoseg/100 g	69.6	± 3.4	62.8 to 76.4	105
Fructose ÷ glucoseratio	1.29	± 0.1	1.09 to 1.5	105
Glucose ÷ waterratio	1.79	± 0.17	1.45 to 2.13	38

How a trained panel describes it

Colour: Very light; normal honey colour
Odour: Weak — Woody, Floral – fresh fruit
Aroma in the mouth: Weak — Woody, Fresh, Floral – fresh fruit (fruity), Warm
Taste: Sweetness medium; acidity weak; bitterness absent
Persistence: Short
Crystallisation: Moderate

The family names are a trained-panel vocabulary: woody means wood, resin, dry leaves, spice — the register of chestnut, heather and honeydew; floral – fresh fruit means flowers and fresh fruit — split by panels into floral and fruity; fresh means cool, minty or anise-like notes that feel refreshing in the nose; warm means caramel, toffee, malt, cooked sugar — the notes of browning. How panels taste honey.

What each measurement tells you

Pollen of the named plant: Share of the pollen that comes from the plant the honey is named after. Varies enormously by plant — chestnut over-represents its pollen, citrus and lavender under-represent theirs — which is why no single percentage defines 'monofloral'.
Colour: Depth of colour on the Pfund scale — 0 is water-white, above 114 is dark amber. Tracks minerals and phenolic compounds, and darkens with heat and age.
Electrical conductivity: How well a honey solution carries current, which rises with its mineral and acid content. The main official test separating honeydew and chestnut honeys (high) from most blossom honeys (low).
Specific rotation: The direction in which the sugars turn polarised light. Fructose turns it left, so blossom honeys read negative; honeydew honeys carry oligosaccharides that turn it right and read positive.
pH: Acidity as a logarithmic scale. Honey is always acidic; honeydew and chestnut honeys sit highest because their minerals buffer the acids.
Free acidity: The acid present as free acid, mostly gluconic acid made by the bee enzyme glucose oxidase. Rises with fermentation, which is why it has a legal ceiling.
Lactones: Acid held in lactone form — the reserve that free-acidity titration does not see. Added to free acidity to give total acidity.
Total acidity: Free acidity plus lactones.
Water: Moisture content. Decides whether a honey can ferment and how fast it pours; set by the nectar, the weather and how long the bees ripened it.
Diastase activity: Activity of the starch-digesting enzyme the bees add. Falls with heating and storage, so a low value in a honey that should be high suggests heat or age — but some honeys, citrus and acacia among them, are naturally low.
Invertase activity: Activity of the bee enzyme that splits sucrose into glucose and fructose. More heat-sensitive than diastase, and a sharper indicator of freshness and gentle handling.
Proline: The main free amino acid, mostly from the bees' own secretions. A low value is one signal of sugar-syrup dilution or of an unripe honey.
Fructose: The sweeter, more soluble of the two main sugars. Honeys rich in it stay liquid.
Glucose: The less soluble of the two main sugars and the one that crystallises. Honeys rich in it set quickly and finely.
Sucrose: Ordinary sugar, mostly split by the bees during ripening. A few honeys — lavender, acacia, citrus — keep more of it naturally, which is why their legal limits are higher.
Fructose + glucose: The two main sugars together. Lower in honeydew honeys, which carry more oligosaccharides — melezitose, erlose and others — made by the insects that produced the honeydew.
Fructose ÷ glucose: The single best predictor of whether a honey crystallises. Below about 1.1 it sets quickly; above about 1.3 it tends to stay liquid for a long time.
Glucose ÷ water: How much glucose there is for each part of water. Above about 2.1 the solution is supersaturated enough to crystallise fast; below about 1.7 it crystallises slowly or not at all.

Population: Authentic unifloral honeys produced in 21 countries of the European geographical area, analysed by 20 laboratories in 11 countries of the International Honey Commission working group formed in 1998; published 2004.

Electrical conductivity and specific rotation are expressed on honey dry matter; every other value on the honey as it is.

Diastase and invertase are given for fresh honeys only; both fall with age and heating.

The limits are the source's 95% confidence limits, replaced by the observed minimum or maximum wherever the limit would have fallen outside the data.

Checked 2026-09-29 against: Main European unifloral honeys: descriptive sheets (2004); Sensory analysis applied to honey: state of the art (2004). Descriptive sheet, pp. S66–S67.

Where it comes from

Floral source: Rhododendron ferrugineum (rusty-leaved alpenrose) on acid soils, R. hirsutum (hairy alpenrose) on limestone, and their natural hybrid R. × intermedium, treated as one class in the European reference description. Rhododendron pollen is under-represented in the honey, so a genuine alpine rose honey can show a modest share of it.
Origins: The Alps — Italy, Switzerland, France and Austria — and the Pyrenees, at altitudes where bees can only be kept for part of the summer.
Origin pages: The Alps
Resolved from both directions — origins this honey names, and origins that name it.
Harvest: June to August (northern hemisphere)
The flowering climbs with the altitude, so the flow runs from June at the lower limit to August on the highest slopes. Hives are moved up for it and brought down afterwards.
The bees: Entirely a product of migratory beekeeping: the altitude is too harsh for colonies to overwinter, so every jar depends on hives being carried up for the flowering and weather that lets the bees fly while it lasts.
What counts as monofloral: No single pollen percentage defines it. The European reference description characterises it by low colour, conductivity and proline and a moderately negative specific rotation, together with the sensory profile, because the pollen is under-represented.
Usual processing: Raw, Spun (centrifugally extracted), Coarsely strained
Made only where beekeepers carry hives to high altitude for the summer. The crop is small and unreliable because the mountain weather decides whether the bees can work the flowering at all, and it rarely meets demand.

What to do with it

A honey to taste on its own or on bread. Its aroma is weak and short, so anything strong — cheese, spice, heat — will simply cover it.

At the tableSpreadingIn hot drinks

Pairings

fresh mountain butter on bread
The butter carries the faint aroma rather than competing with it, and the pale honey's medium sweetness does not need balancing.

Pairing pages this honey appears on

Selected by this honey’s own recorded intensity, flavour families and uses rather than by anything written above — each page prints the rule that put it there.

Where this honey sits in the catalogue

History and traditional use

A honey of transhumance — the same seasonal movement up to the high pastures that alpine herding has followed for centuries, applied to bees.

Claims about this honey

Emerging research

Real studies exist and point somewhere, but they are small, in vitro, in animals, or not yet replicated. Direction is not the same as a result.

Emerging research

Some alpine rhododendron honey contains measurable grayanotoxins, the toxins behind mad honey poisoning.

Italian rhododendron honeys analysed in 2017–2019 contained measurable grayanotoxins in about 30% of samples, at up to 0.10 mg/kg, as reported by Germany's Federal Institute for Risk Assessment. The BfR advises that rhododendron honeys, especially from the Black Sea region, should not be consumed, and notes that people with heart disease taking blood-pressure medication appear more susceptible.

What this does not claim: This is not a claim that alpine rose honey is safe at any quantity, nor that it is dangerous in normal use; it reports measured levels and the national risk assessor's advice. It also does not describe every alpine rose honey: most samples in the Italian survey contained none at a measurable level.

Selected questions and answers on grayanotoxins in honey — German Federal Institute for Risk Assessment (BfR) (2023) · Regulatory guidance Link

Sources

Main European unifloral honeys: descriptive sheets — Apidologie (2004) · Peer-reviewed article Link
Sensory analysis applied to honey: state of the art — Apidologie (2004) · Peer-reviewed article Link
Selected questions and answers on grayanotoxins in honey — German Federal Institute for Risk Assessment (BfR) (2023) · Regulatory guidance Link
HoneyHQ editorial synthesis — HEKNO Ltd · HoneyHQ synthesis

How sources are selected and weighted is set out in the sources and evidence policy.

Guides that cover this honey

Can honey be poisonous? Tutin, grayanotoxins and the lawAlmost never — and the exceptions are specific. Two plant toxins are documented poisoning honey: grayanotoxins from certain rhododendrons, and tutin, which reaches New Zealand honey through an insect rather than a flower.

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