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Hemlock Firewood

Tsuga canadensis·softwood·fair overall rating

Hemlock Firewood at a Glance

Heat Output
15.3M BTU
per cord
Seasoning Time
12–18 months
to dry below 20%
Split Difficulty
easy
Smoke Level
medium
Spark Tendency
many
Fireplace Use
Not recommended
Overall Rating
fair
Best Uses

Burn Characteristics

BTU / Cord

15.3

million BTU

Dry Weight

2,465

lbs/cord

Seasoning

1218

months

Split Difficulty

Easy

Smoke Level

Medium

Spark Tendency

Many

Coal Quality

poor

Overall Rating

fair

Is Hemlock a Good Firewood?

Hemlock gets a bad rap, and honestly... some of it is deserved. Eastern hemlock is common across the Northeast and Southeast, and a lot of people end up with it after a storm or a land-clearing job. It's free, it's available, so you burn it. But don't go in expecting much.

You're looking at 15.3 million BTU per cord with a dry weight of 2,465 lbs. That's mid-range for a softwood, on par with lodgepole pine. The real problem is the coals, hemlock doesn't hold them well at all. The fire burns down to nothing fast, so you're back at the stove adding more wood before you've even settled into the couch.

Easy to split, at least. One of the few good things about hemlock is that it doesn't fight you on the chopping block. Light rounds, straight grain most of the time. But heads up, it sparks like crazy and throws more smoke than you'd want for indoor burning in an older stove. Keep your chimney clean and check it more often if hemlock makes up a big chunk of your wood pile.

This is where hemlock gets a little annoying, it takes 12 to 18 months to season properly, which is longer than a lot of other softwoods. Don't rush it. Green hemlock is smoky, creosote-heavy, and just unpleasant to burn. Give it a full year minimum.

Hemlock works for different firewood types where you just need something burning and don't care about overnight coals. Spring and fall? Sure. Dead of winter with nothing else? You'll be cold. Compare it to Balsam Fir firewood, similar BTU but balsam seasons faster and smells way better.

Species Information

Scientific Name
Tsuga canadensis
Also Known As
Eastern Hemlock
Type
softwood
Regions
Northeast, Southeast
Availability
Common
Fragrance
Good

How many cords of Hemlock do you need?

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How Long Does Hemlock Take to Season?

Hemlock firewood needs 12–18 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 Hemlock, 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 Hemlock in a Fireplace?

Hemlock is not recommended for open fireplaces. It throws many sparks — more than most species — which is a genuine safety hazard when there’s no barrier between the fire and your living space. A single ember landing on carpet or furniture can start a house fire. Burn Hemlock exclusively in a closed wood stove or a fireplace insert with sealed glass doors, where it performs beautifully.

If you want the heat output of Hemlock without the fireplace concerns, a modern EPA-certified wood stove is the best option. Stoves contain sparks completely, operate at much higher efficiency than open fireplaces (72% vs 10–15%), and let you take full advantage of Hemlock’s 15.3 million BTU per cord.

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

Frequently Asked Questions

How long does Hemlock take to season?
Hemlock firewood takes 12–18 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 Hemlock in a fireplace?
Hemlock is not recommended for open fireplaces due to heavy sparking. Use it in a closed wood stove or fireplace insert with glass doors instead.
How many BTU does Hemlock firewood produce?
Hemlock produces 15.3 million BTU per cord when properly seasoned. That's on the lower end, best suited for kindling, quick fires, or supplemental heat.

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