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Clever 'two-finger rule' you should always follow when buying a watermelon

Home> News> UK Food

Published 14:18 16 Jun 2025 GMT+1

Clever 'two-finger rule' you should always follow when buying a watermelon

Treat yourself to a summer of juicy melons.

Rachael Davis

Rachael Davis

One of the best things about the late spring and summer months is the explosion of nutritious, flavoursome and exotic fruits and vegetables lining shelves with reasonable prices.

Having a good idea of when your favourite fruits and veggies come into season is a good idea for your wallet, seeing as UK-grown produce is generally cheaper and fresher than air miles-laden imports, and it’s great for giving you a reason to mix up your diet as the seasons roll by.

Picking a ripe melon is easier than you might thing (Charlene Collins/Getty Images)
Picking a ripe melon is easier than you might thing (Charlene Collins/Getty Images)

With so many of the tastiest options finally in season, it’s the best time to buy things like asparagus, strawberries, and watermelons if you prefer home-grown produce, and for that latter fruit there’s a nifty trick for making sure you get a good’un.

You might think watermelons are the kind of exotic fruit that’s too juicy for these shores, but we do in fact grow plenty of them here. They’re rich in vitamins A and C, potassium, and antioxidants such as lycopene, which is usually best-found in cooked tomatoes.

They’re hydrating too, which is particularly noteworthy given how hot and sunny this summer is likely to be.

However, it’s difficult to gauge how ripe a watermelon is, and getting one that’s ready to eat is generally the preference.

So, how can you figure out a watermelon’s ripeness before cracking it open? Of course, once you do, you’ll recognise a ripe one thanks to its deep red colour, firm texture and sweet flavours, but that’s not much use when you’re browsing them in the supermarket.

One of the common ways to check is to give the outer rind a tap. A hollow but deep sound is generally a good indicator that the watermelon’s ready to munch, but there’s another handy way to check.

According to The Kitchn, farmers have a particular trick for finding the sweetest melons. Writing for the site, Mackenzie Filson said the ‘two finger rule’ is a foolproof way of separating the juicy melons from the stiff ones.

It's all about the stripes (SEAN GLADWELL/Getty Images)
It's all about the stripes (SEAN GLADWELL/Getty Images)

Simply place your index and middle finger on one of the melon’s darker green stripes. If it’s the width of those two fingers, you’re in business.

In her own test, Filson’s watermelon had a stripe of the right width and so it proved a 'sweet and juicy, eat-over-the-sink-style watermelon'.

The pale-green stripes can help you to gauge the ripeness, too, with ripe ones typically having a light and faintly green colour rather than a deep one.

According to Food Republic, shiny watermelons are generally some way off ripeness, with those typically being more recently harvested than the dull ones.

Featured Image Credit: Oscar Wong/Getty Images

Topics: UK Food

Rachael Davis
Rachael Davis
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