Hackberry is good firewood. It produces respectable heat, is generally easy to split, makes good coals, and throws relatively few sparks. It is not in the same class as white oak, hickory, or black locust for long-lasting heat, but it is considerably better than many people give it credit for.
The main weakness of hackberry is its poor resistance to decay. If you cut and split it promptly, stack it off the ground, and let it dry properly, it makes dependable firewood for a stove, fireplace, or outdoor fire.
Hackberry Firewood at a Glance
| Heat output | About 21.2 million BTUs per dry cord |
| Overall quality | Good mid-range firewood |
| Ease of splitting | Generally easy |
| Smoke | Low when properly seasoned |
| Sparks | Few |
| Coals | Good |
| Seasoning time | Usually 6–12 months, depending on conditions |
| Target moisture | Below 20 percent |
| Main drawback | Rots quickly if stored badly |
How Much Heat Does Hackberry Produce?
Utah State University Extension lists hackberry at approximately 21.2 million BTUs per dry cord. That places it firmly in the middle of the firewood range.
In the same comparison, hackberry produces slightly more heat per cord than green ash at 20 million BTUs, birch at 20.8 million, and American elm at 20 million. It falls just below black walnut at 22.2 million and farther behind red oak at 24.6 million, black locust at 27.9 million, and white oak at 29.1 million.
This means hackberry is perfectly capable of contributing to a home-heating supply. You may need to reload the stove more often than you would with denser woods, but it is not merely campfire wood or something that should be discarded.
How Hackberry Burns
Dry hackberry lights reasonably easily and burns with steady, moderate heat. It produces good coals, helping the fire retain heat after the flames have settled.
Utah State University Extension rates hackberry as producing low smoke and few sparks. That makes it suitable for wood stoves and fireplaces, although a screen should always be used in front of an open fire.
These ratings assume the wood is properly seasoned. Wet hackberry will be harder to light, produce more smoke, deliver less useful heat, and contribute more creosote to the chimney.
You can burn hackberry by itself or mix it with denser woods such as oak and hickory when you want a longer-lasting overnight fire.
Splitting and Seasoning Hackberry
Split hackberry soon after cutting. This exposes more surface area for drying and reduces the chance of the rounds beginning to decay before they are ready to burn.
Allow at least six months of good drying weather, although closer to a year may be necessary in humid climates, shaded yards, or when the pieces are large. Do not rely on time alone. The EPA recommends burning firewood at less than 20 percent moisture content.
To test it properly, split a piece open and press the moisture-meter pins into the newly exposed center. The outside can feel dry while the middle still contains too much moisture.
For the best drying conditions, stack the wood outdoors in a sunny or breezy position, raise the bottom row off the soil, cover the top, and leave the sides open to airflow.
The Main Problem: Hackberry Rots Quickly
Purdue University describes hackberry as having no resistance to decay. Rounds left on wet ground or exposed to repeated rain can become soft and punky surprisingly quickly.
This does not make hackberry bad firewood; it simply means it should be processed and stored properly. Cut and split it promptly, keep the pile off the ground, and protect it from rain while maintaining airflow. Badly rotten or moldy wood has reduced fuel value and should not be burned indoors.
How to Identify Hackberry
“Hackberry” usually refers to common hackberry (Celtis occidentalis), although sugarberry (Celtis laevigata) is also called hackberry in parts of the southern United States. Their wood is very similar and is commonly sold together.
The easiest way to recognize a mature common hackberry is its gray bark, which develops distinctive corky warts, knobs, and ridges. Other identifying features include:
- Alternate leaves with sharply pointed tips and uneven bases
- Toothed leaf edges and three prominent veins near the base
- A rough upper leaf surface
- Small orange-red to dark-purple fruits containing one hard seed
- Pale yellow, grayish-yellow, or light-brown wood
Sugarberry typically has smoother bark and narrower leaves with fewer teeth. The distinction is rarely important once the wood reaches the firewood pile because both burn similarly.
Is Hackberry Worth Burning?
Yes. Hackberry is useful mid-range firewood that combines respectable heat with easy splitting, low smoke, few sparks, and good coaling qualities. It will not burn as long as premium woods such as white oak or black locust, but it is more than adequate for everyday heating and outdoor fires.
Its poor decay resistance is the one significant catch. Process it quickly, store it off the ground, and wait until it measures below 20 percent moisture. Do that, and hackberry is absolutely worth putting in the firewood stack.
