Cube Watermelon – One of the Most Expensive Fruits in the World

Cube watermelons, often referred to as square watermelons really do look like they sound. Believe it or not, in today’s society cube shaped watermelons really do exist. 

Why Cube Watermelons?

You may now be wondering why would anyone need a cube shaped watermelon? There is a number of reasons companies began growing these watermelons. For starters, many people have needed to downsize due to rising electricity costs and these square watermelons can easily be stacked beneath or above something else in a small refrigerator. In their country of origin, Japan, being space smart really is important. The shape of these watermelons also allows them to be easily stacked for transportation. Furthermore, these watermelons have been grown for their ornamental value. In Japan, many people display these unusual cube watermelons in their restaurants and homes to be observed by others.

In Japan, it is not uncommon for someone to give a watermelon as a gift. For those looking for something with a novelty purpose, these cube watermelons are perfect. Another reason cube watermelons were introduced was their ability to be sliced without rolling from side to side. We all know how difficult it can be to cut down a large whole watermelon. These watermelons can be easily sliced into the perfect squares to be enjoyed.

Who Invented Cube Watermelons?

Cube watermelons were thought to be first invented in 1978 by Tomoyuki Ono, who was a graphics designer at the time. Tomoyuki presented her unique watermelons in a Tokyo gallery prior to patenting her idea in the United States. While it is suggest Tomoyuki invented these melons, others claim that they were introduced in 1980 in Kagawa.

It is not until recent times that these watermelons have grown in popularity. Although they originated in Japan, these watermelons are now popping up all around the world, in particular in large countries such as the United States.

How are Cube Watermelons Grown?

When I first heard that there was such thing as a cube shaped watermelon the first question that popped into my head was ‘How do they grow them?’. These cube watermelons are not left on the ground to grow into their natural shape. The vine is trained into large square boxes where the melon grows to maturity. The young watermelon is left in the box to naturally grow and take shape of the cube. The boxes these fruits are grown in are generally made of glass so that the sunlight can still reach them. The farmers allow these fruits to grow to approximately 19cm in diameter before removing them from their box and shipping them off to supermarkets to be sold to their new owners. The process of growing these melons is actually more straight forward than one may have first thought.

If you have a green thumb yourself, you may even be interested in growing your very own cube watermelon. Below we have listed some basic equipment and instructions for a ‘do-it-at-home’ cube watermelon crop.

Growing Your Own Cube Watermelon

What You Will Need:

• A Large Garden
• Watermelon Seeds
• Square Watermelon Mold 
• Watering Can
• Mulch
• Soil
• Water

Directions:

1. Choose a bare spot in your garden that is relatively large and receives direct sunlight during the day.
2. Prepare your soil by adding compost if needed. Watermelons need nutrients to grow.
3. Watermelon seeds should be planted into warm soil. If needed you may need to place a black tarp on soil for a couple of weeks if you live in a cooler climate.
4. When the soil is 70 F (21 degrees Celsius) you can prepare to plant your watermelon seeds.
5. Create small hills in your garden that are approximately 3 inches tall.
6. Sow a handful of seeds into each hill you have created.
7. Water the seeds and place some mulch over them.
8. Make sure you water the seeds at least once a week.
9. Purchase a square watermelon mold.
10. When the watermelon is the size of a small ball place it in your square watermelon mold.
11. Continue to water your melon as it grows within the mold.
12. Remove the mold once the watermelon is fully grown.

Costs Associated with Cube Watermelons?

Cube watermelons were originally created so that those who were poorer and could only afford small refrigerators in Japan could still enjoy watermelon. While they were originally designed with good intent, these watermelons soon became a phenomenon worldwide. This cube watermelon craze led to a dramatic increase in price. In a Japanese supermarket you can purchase a unique cube watermelon for a pricey $125.00 USD. Often you can find them cheaper if you shop around, although due to the popularity of these prize fruits, generally they sit around the $100.00 USD mark.

Other Watermelon Shape Crazes

Once the Japanese realised the popularity of the cube watermelon, other shaped watermelons began to appear on the market. The heart-shaped watermelon was first noticed in supermarkets during 2009 and has become a watermelon icon in Japan. These heart-shaped watermelons will set you back $200.00 USD to $300.00 USD each! Other shaped watermelons included the explosive watermelon which is designed to replicate a bomb, the pyramid watermelon, the human faced watermelon and the calabash shaped watermelon.

Fun Facts About Cube Watermelons

• In 2013, watermelon enthusiasts from Russia were paying out up to $900.00 USD for a single cube shaped watermelon 
• The method used to train these watermelons is similar to how people have trained bonsai’s for many decades
• In Tokyo in 1979, cube watermelons were sold for $20.00 USD compared to a normal watermelon that was $9.00 USD
• Japanese farmers grow hundreds of these cube watermelons each year
• Cube watermelons are not genetically modified as previously suggested by many individuals
• Growing a cube watermelon in your own backyard is a possibility