A november 1945 issue of popular science describes the method of the straw test.
Broom straw watermelon test.
You can find a straw from the broom section of the store.
The more it turns the sweeter it is.
Get a piece of broom straw that is as straight and possible and find a pet well rounded spot on your melon lay the piece of straw on that spot and gently let it go.
Just pull a dry straw out of the broom and go to the melon section.
Lay a broom straw perpendicular on the middle of the melon.
If it lays still it in not ripe.
How to tell if watermelon is ripe.
If it spins it is ripe.
According to her article this method of checking a watermelon s ripeness dates back as early as 1945 where a picker places a broom straw horizontally across a watermelon.
All you need is a straight broom straw or blade of grass to tell if you have a sweet melon.
The riper the watermelon the more magnetic it becomes causing the broom straw to turn towards the magnetic activity just like a compass needle.
You can also tell if a watermelon is ripe by placing a dry straw perpendicular to the melon and watching how fast it will align with the melon.
Can a broom straw determine ripeness.
If the melon is ripe the straw will turn to a 45 degree angle.
The straw acts like a compass needle.
If it is green it will not move.
I ve heard a lot of watermelon myths in my time as the watermelon guy but this one takes the cake.
So there you have it.
Many watermelon aficionados continue to trust the unique method after many decades of use.
If your melon is ripe the straw will actually spin it may not spin like a helicopter blade but it will turn on its own.
The video above posted by stacy lyn harris owner and author of the blog game garden claims that you can test a watermelon s ripeness or sweetness using a piece of straw from a common.
If the melon is ripe the straw will turn to a 45 degree angle.
The more ripe water the faster it will move in alignment with the melon.
I believe it has something to do with magnetism.
So if when you place your straw sideways on the bottom of the watermelon the more it turns towards longways the riper the watermelon.