Although black walnut wood produces a toxin called juglone, it can be burned without problems. It’s not most people’s first choice for firewood because it’s expensive and is mostly used for furniture.

Many people are skeptical about the safety of burning black walnut wood because the tree itself produces juglone. This toxin can be dangerous when exposed to plants, animals and children. Black walnut wood chips are also toxic, so care should be taken when children or plants are around a fire. Once the juglone comes into contact with air, water or bacteria, the toxin dissolves. This makes it safe to burn because the toxin is not carried in the smoke.

Amount of Smoke, Sparks and Charcoal Production

Seasoned Walnut, Black or White, will produce very low smoke and little risk of sparks. That said, this wood burns to ash quickly. If you need a bed of embers at the end of a good fire, strictly don’t burn walnut. Mix it with elm or oak to get a decent bed of coals for more warmth over time.

That said, the scent of the nut when it burns is both pleasant and delicate. Since this wood looks quite nice in your fireplace, it can make a nice fire to use more for exposure than heat. If you only have walnut to use in your wood stove and you need fire to heat your home, you can expect to have to get up at night.

Is walnut wood toxic to humans?

Now that you know the potential dangers of burning walnut wood, you may be wondering if it is toxic to humans. The answer is no; walnuts are not toxic to humans. However, as I mentioned earlier, the smoke from a nut fire can be harmful if inhaled over long periods of time. That’s why it’s important to burn walnuts only in a well-ventilated area.

Actually, there are many benefits of burning nuts. Walnut is a renewable resource, a clean burning fuel and has a pleasant aroma. Just be sure to take the necessary precautions to avoid the potential dangers of burning nuts.

Is it safe to burn black walnuts in a fireplace?

Now that you know all about why black walnuts burn hotter and cleaner than other types of firewood, is it okay to use this type in your fireplace?

As long as you keep a close eye on the flame and make sure it burns steadily, there shouldn’t be any problems with using black walnut wood in your fireplace.


  • BTU: 22.2 million
  • Weight: 3,192 lbs per dry wire
  • Curing time: 6 months – 2 years
  • Splitting: Easy
  • Smoke: Low
  • Smell: Good

Walnut trees are a hardwood that has many different types of species. Depending on the species, walnut trees will grow to be 30-130 feet tall. The leaves are feather-shaped and smooth. The bark of walnut trees depends on the species and varies greatly.

Leave a Reply

Your email address will not be published. Required fields are marked *