Cigars 101

Cigar Bloom vs. Mold: What’s the dif’?

One of the more unnerving experiences for cigar smokers, especially those who are new to the wonderful world of premium handmade cigars, is when they discover that the wrappers on some of their prized primos have developed a white, fuzzy substance. The knee-jerk reaction to this is usually something like, “Houston, we’ve got a problem.”

Well, you may have a problem and you may not. It all depends on what that substance on your cigars really is. It may be one of two things: “the good,” something called “Bloom,” also referred to as “Plume,” or, “the bad and the ugly,” good old-fashioned mold.

Bloom is what happens when the oils in the tobaccos disperse throughout the cigar and eventually reach the wrapper. These “essential oils” congregate on the surface of a cigar and appear as very tiny white crystals. In fact, you can sometimes shine a light on the cigars and the crystals will shimmer a bit as they reflect the light. The result of these dried crystals is the appearance of a powdery white substance on the wrapper (see photo 1).

So, what should you do if your cigars have bloom? Nada. Bloom is harmless and is a common feature on cigars that have aged for long periods of time, especially cigars with oily wrappers. It’s a sign that your cigars are aging nicely and still healthy. But don’t take it for granted. Keep an eye on it, especially if you’ve never encountered it before, because it may turn out to be something else. Assuming it is bloom (or plume),
very lightly brush-off the bloom with your finger. It will not affect the flavor or bouquet of your cigars.

Mold on foot of cigarNow let’s get to the bad and the ugly – mold. Mold is a fungus that appears on your cigars when they are over humidified. It can be found in various colors, including white, gray, blue-gray, or blue-green. The best way to describe mold, as opposed to the powdery nature of bloom, is that mold appears as fuzzy patches on your cigars. These patches are 3-dimensional and look like miniature cotton balls. Mold occurs most often on the wrapper, but can also occur on the foot and/or within the filler of a cigar (see photo 2).

If your cigars have mold the first thing you want to do is to get the affected sticks away from your other cigars. This leads to the oft-asked question, “Should you toss a stick that has mold on it?” To be absolutely safe, yes. Many cigar smokers wipe the mold off their cigars and smoke them anyway. You can try it, but it could be risky, because mold comes in different varieties, some of which can cause illness if they are allowed to culture in the wrong place, like in your mouth or in your lungs. Note however, that there are millions of varieties of mold, and not every type will cause illness, but some kinds of mold are able to serve as pathogens in the body and can cause respiratory or other medical conditions.

Mold spreads by producing spores. These spores then spread the fungus to you or to the rest of your cigars. So, if you’re feeling lucky, brush off the mold and smoke them; otherwise, you’re better off trashing them.

When checking your cigars, be sure you always check for signs of mold, especially if your humidity has been on the high side, say 75% and above. If you find some cigars with mold and decide to salvage them, the very least you should do is get them away from your other cigars, wipe off the mold, and move them to a different humidor (preferably empty) or another container. If you take that route, do not humidify the cigars for at least 12 hours. They are probably already too moist, and the idea here is to let them dry out for a while.

Finally, the best medicine for warding off mold spores is to keep the humidity level in your humidors from getting too high in the first place.

Thanks to David “Doc” Diaz at for providing most of the source material for this article.


John Pullo

John Pullo

Editor in Chief

This is not his picture, nor does John even have a beard. Interestingly, his Social Security number is all ones. All we can say is " "You will know him by the mullet he wears." "

Show all John Pullo's Articles
rafael nodal top 5 cigars cacover

5 Cigars That Made My Career: Rafael Nodal

Rafael Nodal has had a hand in blending some of the most renowned cigars in the world, gathering huge ratings and prestigious awards along the way…not bad for a kid who was picking oranges in Cuba at 15. Today, we sit with Rafael to discover the 5 cigars that influenced his style, earned him success, and give some little-known facts about your favorite Altadis and Boutique Blends.

Read More
5 things you need to know about Culebra cigars CACover

5 Things You Need to Know About… Culebra Cigars

Culebras: those snaky-looking cigars, entwined in a set of three. Hard to find and rarely made these days, but they sure are fun to smoke, especially with two friends. Culebra cigars also have an interesting back story. We dig into what makes these time-honored cigars so unique, and demonstrate how to smoke them.
Read More
Nick Melillo foundation cigars interview podcast CACover

Master Blenders: Nick Melillo, Founder of Foundation Cigars

Nick Melillo is the founder of Foundation Cigar Company, and the man responsible for such highly-rated cigars as El Gueguense, Tabernacle, Charter Oak, and Highclere Castle, Nick (a.k.a. "Nick R. Agua") has accomplished in 15 years what takes some blenders to do in a lifetime. How'd he do it? Tune in and listen!
Read More
Buying cigars in the US vs the UK

Buying Cigars Overseas: The US vs UK Experience

We love our cigars, and so do our UK BOTLs. But if you're buying cigars in London, the difference in the experience is more than shocking. Read more now!
Read More