There’s a debate in the Cannabis community that’s been raging for a ZILLION years: does the colour of your burned ash actually dictate quality? Here’s what some people assert: if your joint burns black instead of white or grey, then you are dealing with a plant that was over-fertilized or treated with chemicals. The taste, flavour, strength, and look of bud are not affected by the added use of said chemicals. So the only way to tell is to smoke it.



We need to look at two different stages in the farm to table process: flushing and curing. Clean water is supposed to remove any residual trace of carbon or nitrate potentially present in the farming process. If it’s not dried properly, then you might argue the chemicals didn’t perspire entirely. But the way in which you smoke it can affect the colour without any extra fertilizers or bad chemicals present. You might get a false positive from lighter fumes, rolling paper dyes, or some other factors unkownnnn. It’s probably something most people who smoke weed don’t even consider. But for the heavy tokers looking for that high THC perp skerp out there, it’s a real thing.

organic rollies


If you are using neutral smoking accessories/rollies (no chemical additives, etc) then there is a test you can do to see if the weed has been washed properly or not. Here’s what you do: Smoke down a joint and ash it onto white paper. Then with your finger, rub the ash. If the ash turns to powder and is a greyish or white colour, then it’s been properly washed or not had bad chemicals used in its growing process. If the ash is a bit sticky and turns a color that is closer to black than white, then there is a decent chance that the weed was not washed properly.

black ash

Is it the end of the world if my weed burns black?

No, probably not. Chances are, it’s you doing the test wrong or this whole ash thing is in fact just utter BS. There are some people that say your weed will always burn black because that’s what happens when you combust things: they turn black. If you don’t need to go to a hospital after smoking “black ash” weed, then don’t worry bout it :-D.