What is Fret Sprout?
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What Is Fret Sprout (And How Do You Fix It?)

Ever run your hand down the edge of a fretboard and feel the guitar fret ends sticking out? That’s fret sprout! Here’s what causes it, and what you can do to fix it.

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What is Fret Sprout?

Fret sprout happens when the wood of a guitar neck or fretboard shrinks from dryness leaving the ends of the frets sticking out.

So your guitar frets are sticking out of the side of your fretboard shredding your fingers – is that a bad thing?

Let’s just say, it’s not as good as it could be.

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fret sprouts

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Northern winters can be nasty! As we roll into a cooler season at this time of writing, November in the Great White North to be specific, furnaces are coming to life spitting out all that warm dry air.

Being that a guitar fret is literally a metal wedge in the fretboard, you have two different elements reacting against each other with this seasonal change – guitar frets respond just a hair whereas wood is much more lively.

Did you know, a solid spruce top on an acoustic can expand and contract as much as an eighth of an inch over the course of a season?

Amazing, and no wonder we suffer “winter cracks”.

What does this mean for those “budget friendly” guitars coming in by the ship load?

And how does it affect your favourite axe that cost you a pretty penny?

Cheap Guitars and Fret Sprouts

Just a few short years ago we started seeing off-shore manufacturers flooding the market with very inexpensive GSO’s (guitar shaped objects) designed to capture the rising tide of interest generated by games such as Guitar Hero and Rock Band.

Very much akin to the wave of cheap Japanese imports we saw in the 60’s and 70’s capitalizing on the “new” rock and roll phenomenon with one big difference; the wood used during the first invasion was at least better seasoned and therefore less prone to the ravages of drastic changes in environment.

The raw materials used in some guitars in this latest assault on the entry level guitar market are produced at a new lower standard. They are pumped out for one reason only – to turn a buck.

Within weeks of entering northern north America, the necks start shrinking back and frets start popping out.

A friend of mine liked to call these overly green flash-seasoned instruments – bologna slicers.

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What Causes Fret Sprout?

Fret sprout is caused by the wood of the guitar neck drying out leaving the fret ends exposed beyond the fingerboard.

Even the best custom shop and hand-built boutique instruments aren’t immune the effects of this excessive dryness.

Once a guitar arrives at your home, the amount of humidity in your living environment will have a direct impact on the instrument.

The structural integrity of the guitar can easily become compromised if it’s too dry or too humid.

Instruments that have lost too much natural moisture, particularly acoustic guitars, can start to develop the following problems:

  • top cracks
  • side splits
  • lifting bridges
  • finish checking
  • neck humps, bulges
  • uneven guitar frets
  • and… fret sprouts

On a bound neck Les Paul the nibs start to split as evidenced by hairline fractures that develop on the side of the binding.

Sometimes if left unchecked, the protruding frets will push the binding clean off in chunks!


Other instruments without bound fret ends will show evidence in that the finish starts off where the fret ends meet the edge of the neck.

Does this mean the instrument is bad? No, not necessarily. But it will need attention.

Of course you could have avoided the whole problem of fret sprouts by buying an instrument such as a violin, fretless bass, or even a fretless guitar. But you love guitars, guitars with frets.

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Fret Sprout Fix – What can you do about it?

Let’s start with preventative measures, guitar humidifiers:

For acoustic instruments, purchase a good quality guitar humidifier such as a D’Addario Acoustic Guitar Humidifierblank to help combat seasonal dryness. These things are particularly necessary if you have a nice acoustic and want to see it survive the humidity swings.

For electric guitars, the best thing you can do is keep the instrument in a stable environment free from drastic changes in temperature and humidity. Rough attics and unfinished basements are a big no-no.

The best way to get these proud fret ends removed is to take your guitar to your local guitar service professional. It’s a pretty straight forward job for someone who knows what they’re doing.

Regardless of the grade of instrument, the fix is relatively easy, a variation of a fret levelling, and a nominal cost to you the owner. It usually doesn’t take much more than a half hour depending on finish polishing.

Filing and dressing fret ends

In a nutshell, a flat file is used with great care to gradually remove the offending fret ends down to the neck surface.

The freshly squared off ends will then usually benefit from a nice rounding over or bull-nose treatment with a fret end file and then a fine polish to make them more comfortable under the players touch.

Then the next seasonal change comes and with the increased humidity, frets shrink back – they literally turtle up into the neck a bit. Not a problem though if you take good care of the instrument

Your fingers will thank you for it.

Follow Steve Blundon:
Steve Blundon is a business owner, published author, former music teacher and active master guitar tech who's been servicing instruments for over thirty years. Visit Author's Page.

6 Responses

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    Scott Mc\william
    | Reply

    Great article. Steve I have heard of people fixing this type of problem with a fret hammer. Any thoughts?

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      Steve B.
      | Reply

      Not my first choice although a hammer will work on many other things – even people! The excess material needs to be removed completely whereas a hammer would simply squish things around. In fact, if you tap a protruding fret from one side of the neck there’s a very good chance it will rail across the slot allowing the excess to come out the other side. Fender used to use a similar “sliding fret” process on their production line many years ago where the frets were literally shoved in from one side of the neck; a skilled worker could fret an entire neck in just a couple of minutes!


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        Dave K.
        | Reply

        Hammers have specific – limited – applications. An attempt to hammer the fret sideways could easily blow out the side of the bed of the fret board, and Gorilla glue isn’t colour-matched. Just saying…

  2. blank
    | Reply

    After cleaning up my fret ends i have a few places i filed slightly into the finish, when i first began i got abit deep till i practiced a while lol would you suggest just polishing it up or a quik swipe with a laquer or glue to prevent any damage or drying out

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      Steve B.
      | Reply

      Hi Chris, if you’re talking about the finish on the side of the fretboard, yes, see if you can seal up the finish to prevent moisture penetration and de-lamination. Just be careful of course.

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