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Red Alder Firewood

Alnus rubra·hardwood·fair overall rating

Red Alder Firewood at a Glance

Heat Output
14.8M BTU
per cord
Seasoning Time
6–18 months
to dry below 20%
Split Difficulty
easy
Smoke Level
low
Spark Tendency
moderate
Fireplace Use
Yes (use spark screen)
Overall Rating
fair
Best Uses
Kindling, Campfire, Fire Pit

Burn Characteristics

BTU / Cord

14.8

million BTU

Dry Weight

2,380

lbs/cord

Seasoning

618

months

Split Difficulty

Easy

Smoke Level

Low

Spark Tendency

Moderate

Coal Quality

good

Overall Rating

fair

Is Red Alder a Good Firewood?

Red alder is the Pacific Northwest's most common hardwood, and if you heat with wood anywhere from Northern California up through Washington and into Alaska, you've probably burned your share. It grows fast, it grows everywhere, and people are always clearing it. Free firewood doesn't get much easier.

Don't let the "hardwood" label fool you too much, at 14.8 million BTU per cord and 2,380 lbs. dry, red alder hits like a middleweight softwood. It's nowhere near oak or maple territory. But it burns clean with low smoke, throws only moderate sparks, and leaves good coals behind. That coal quality is honestly the best thing about it.

Splitting alder is a breeze. Fresh rounds practically fall apart, and even bigger pieces don't put up much of a fight. It's one of those species where you can get a cord split and stacked in an afternoon without destroying your back. Clean, straight grain, no drama.

Seasoning time ranges from 6 to 18 months, and that wide range is real. Thin pieces dry in half a year no problem. Bigger rounds closer to 18 months. Alder has a reputation for rotting fast if it sits on the ground, so get it split, stacked, and off the dirt right away. Covered top, open sides, good airflow.

Red alder shines as a firewood type for shoulder season burning, campfires, and mixing with denser woods. The salmon smokers up in the Northwest swear by it for a reason, clean, mild flavor, burns steady. For serious winter heating in the PNW, you'll want Douglas Fir firewood as your backbone. But alder is a great complement.

Species Information

Scientific Name
Alnus rubra
Type
hardwood
Regions
Pacific Northwest, West
Availability
Abundant
Fragrance
Slight

How many cords of Red Alder do you need?

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How Long Does Red Alder Take to Season?

Red Alder firewood needs 6–18 months to reach proper burning moisture below 20%. The dense wood releases moisture gradually, so plan at least one full year ahead. Split it as small as practical to speed drying, stack it in a sunny spot with open sides, and use a moisture meter to confirm it’s ready before loading the stove.

With Red Alder, the biggest mistake people make is not splitting it soon enough. Whole rounds can take twice as long to dry as split pieces. Get it split and stacked the moment you bring it home, ideally in a spot with full sun and good wind exposure. Check it with a moisture meter before burning — don’t guess.

For detailed drying timelines for all 70 species, see our firewood seasoning guide. And if you want to understand why seasoning matters so much, our green vs seasoned firewood page breaks down exactly what happens when you burn wet wood.

Can You Burn Red Alder in a Fireplace?

Yes, Red Alder can be burned in a fireplace. It produces moderate sparks, so a spark screen or glass doors are recommended for safety. With a screen in place, it burns nicely and provides good heat. In a fireplace insert with sealed glass, the spark concern is eliminated entirely and Red Alder performs well.

For the best fireplace experience with Red Alder, make sure it’s fully seasoned below 20% moisture. Wet wood of any species will smoke heavily and dirty your fireplace glass. Use a moisture meter to check a freshly split face before burning. Red Alder produces good coals, which means steady, long-lasting heat from your fireplace without constant tending.

Wondering which species are the best fireplace choices overall? Check our best firewood rankings, or compare Red Alder against all 70 species on the BTU chart.

Frequently Asked Questions

How long does Red Alder take to season?
Red Alder firewood takes 6–18 months to season to below 20% moisture content. Plan at least one full year ahead. Always split before stacking — rounds dry far slower than split pieces.
Can you burn Red Alder in a fireplace?
Yes, Red Alder works in a fireplace. Use a spark screen for safety since it produces moderate sparks.
How many BTU does Red Alder firewood produce?
Red Alder produces 14.8 million BTU per cord when properly seasoned. That's on the lower end, best suited for kindling, quick fires, or supplemental heat.

How many cords of Red Alder do you need?

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