I’ve been keeping bees for several years now, and this is an issue I’ve personally encountered both in my own hives and when helping newer beekeepers troubleshoot harvest problems. Honey that smells “off” is one of those surprises that can be alarming the first time it happens, especially after months of work caring for a colony.
Early on, I assumed bad-smelling honey always meant something had gone seriously wrong. Over time, I learned that while some smells are a real warning sign, others are completely normal and tied to things like moisture levels, nectar sources, or timing of the harvest. This guide reflects what I’ve seen firsthand working with active hives, not just textbook explanations.
You may decide to become a beekeeper to connect with the environment and to feel the thrill of learning about bees, while others might have pollination or sustainability as a motive. But probably for all beekeepers, getting to harvest their own honey is the moment they will be really longing for. So imagine you’ve worked and patiently waited for the harvest season to arrive. And, to your surprise, you realize that your honey smells bad!
There are several reasons why your honey might have a distinct, unpleasant smell. Sometimes it’s absolutely normal and there’s nothing to worry about, and other times a serious problem is the cause. One common reason is fermentation, while another source of this bad smell could simply be the surrounding plants’ nectar. But if you’re unlucky, your hive could even be infected.
In my experience, most cases fall into the “normal but surprising” category rather than a true emergency.
If you do a little search on the web, you will quickly find out that there are a lot of beekeepers out there reporting that their honey smells bad and wondering what’s wrong. Depending on the exact source of the problem, beekeepers could be stating that their honey is giving off a sour, acidic or kind of alcoholic smell. Other times, they claim to be detecting an ammonia scent, whereas in some cases they are describing a horrible smell that reminds them of a rotting animal.
I’ve heard all of these descriptions directly from other beekeepers during harvest season, especially from those extracting honey for the first time.
So if you find yourself in a similar situation with some stinky honey in your hands, you are definitely not alone. And a bad smell, provided that you can stand it, does not necessarily mean that your honey is not edible. Consuming it or not depends to some extent on the source of the odor problem. So let’s take a further look into the three most common reasons why honey smells bad, as well as some tips to fix each problem.
Reason 1: It Could Be Fermented
What exactly causes honey to ferment? Raw honey, when it has not been pasteurized, contains about 18 to 19 percent water. If the honey’s moisture rises above that level, and the environment temperature is rather high, above 21°C, yeast and enzymes will develop. These types of yeast and enzymes are naturally deposited there by your worker bees and will start multiplying if conditions allow it.
I’ve personally seen fermentation start simply because honey was pulled a little too early during a humid stretch of weather.
Therefore, moisture and heat are the two key factors causing your honey to ferment. Fermentation is highly likely to occur when you harvest your honey too early or when water gets inside your honey storage container. Although for some people, fermented honey is considered to be completely safe for consumption and to offer even more benefits than normal honey, its weird appearance, smell and taste could sometimes mean that your honey will lose up to half of its value if you try to sell it.
For more information, see our article: What Is The Proper Moisture Content Of Honey?
Fermented honey is a common issue beekeepers will encounter. When honey is left unpasteurized and becomes fermented, it turns from liquid to a bubbly and foamy substance, especially at the top. As carbon dioxide is produced due to the fermentation, pressure rises. And this is why it is important to not completely fill your honey storage containers.
I’ve opened sealed jars that audibly released pressure, which is always a clear sign fermentation has already started.
Furthermore, when your honey is fermented, you will notice that its taste becomes rather sour or sort of alcoholic and unpleasant. Fermentation will also give your honey a sharp, acidic smell, which will probably remind you of yeast or even vinegar.
To avoid facing a fermentation problem, you should first make sure that you don’t extract the honey from your beehive too early. If your honey is sealed with beeswax cappings, then it is unlikely to ferment. Once you collect it, you need to ensure it has the right concentration before storing it away. To do so, you can use a honey refractometer, with which you will be able to measure your honey’s moisture.
Checking moisture content before storage has saved me from losing entire batches more than once.
If the level of moisture is right, you can store your honey right away. If it’s higher, you can remove the excess water with the use of a dehydrator. Storing it inside the refrigerator could also help avoid fermentation, as the yeast will not develop at low temperatures.
But if your honey does get fermented in the end, there is still a way you can fix it, as you can place the container in hot water in order to liquefy it back. If you heat it to around 62 to 65°C for about 15 to 30 minutes and immediately cool it, you will be able to pasteurize it. Pasteurization will help prevent fermentation, but will also destroy some of your honey’s taste and aroma. See our article on The Beekeeper’s Guide to Bottling Honey.
Reason 2: Your Hive Could Be Diseased
Honeybees are subject to various diseases and abnormal beehive conditions. Some of them are simpler to handle, while others can be very contagious and dangerous, so being able to recognize the first signs of disease in your beehive is crucial. In my experience, smell alone is never enough to diagnose a hive problem, but it’s often the first thing that tells you something isn’t right.
Some of the most common diseases your beehive might experience are varroa mites, nosemosis, amebiosis, chalkbrood or stonebrood, and of course American Foulbrood.
For more information, see:
Depending on the exact disease you might be facing, the symptoms might differ but the appearance and smell of your beehive will for sure change significantly. Darker brood cells, with perforated or sunken cappings are a common indicator of American Foulbrood.
When inspecting hives, I’ve learned to trust visual brood patterns more than smell alone.
If your beehive is diseased, being able to fix the problem is uncertain. In some cases, the administration of antibiotics might be enough, while in other cases it will not be that simple. Once again, the key here is observation.
Regular inspections during spring and fall have helped me catch issues early before colonies collapsed.
Reason 3: The Distinct Smell/Taste Of Surrounding Plants
One possible reason your honey smells unpleasant could be the surrounding plants your bees are foraging on. The nectar collected by your bees directly influences the chemical composition of the honey, determining its smell, taste, and overall characteristics. If the nectar source has strong or unusual properties, the resulting honey can carry those traits.
How Plants Affect Honey’s Smell And Taste
Certain plants, especially those in the aster family, can impact both the smell and taste of honey. These plants include goldenrod, dandelions, and daisy-like flowers that grow in clusters. While these flowers provide abundant nectar, their chemical makeup can produce honey with distinct and sometimes overpowering odors.
When bees turn nectar from these plants into honey, the smell can become quite pungent, reminiscent of vinegar, ammonia, or even the flower itself. However, the taste of the honey is often quite different from its smell. Many beekeepers describe this type of honey as having a unique and sometimes surprising flavor that does not align with its initial scent.
While honey with a strong smell isn’t necessarily bad, some beekeepers prefer to leave it for their bees rather than harvesting it. This decision is often made because:
The honey’s distinct aroma and taste may not appeal to everyone.
It’s practical to let the bees keep this honey, especially if it’s produced from fall-flowering plants, as they will need it for winter survival.
If your bees are foraging on plants in the aster family during the fall, consider harvesting your honey earlier in the season. By extracting honey in early fall, you can separate the lighter, milder honey from the stronger-smelling varieties that are produced later. Allow your bees to keep the honey made from fall nectar sources to sustain them through the winter months.
This approach not only ensures that you harvest the most desirable honey but also helps your colony maintain a healthy supply of food for the colder months. By planning your harvests around the blooming cycles of local plants, you can better manage the characteristics of your honey while supporting your bees’ needs.
Final Thoughts
Stinky honey is a rather common situation that beekeepers all around the world face. The nature of the smell actually depends on the reason causing the problem. You will sometimes be able to fix it or just ignore it and let your bees move on with their lives, while other times there won’t be very much you can do.
This article was updated in 2026 to reflect current beekeeping practices and hands-on experience working with active hives.