Ever wondered why a watermelon could cost as much as a used car?
Well, in Japan, a black jumbo watermelon just sold for a whopping $6,100! That’s right, this isn’t your average grocery store watermelon. It’s a Densuke watermelon, and it just broke records as the priciest watermelon ever sold in Japan, and maybe even the world.1
What is a Densuke Watermelon?
The Densuke watermelon is a rare and highly prized variety of watermelon that is exclusively grown on the island of Hokkaido in Japan. It’s known for its distinct appearance with a dark, almost black rind and a sweet, crisp, and nearly seedless red flesh.
Here’s why Densuke watermelons cost thousands:
- Rarity and Limited Supply: Densuke watermelons are only grown in a specific region of Hokkaido and have a limited growing season. The meticulous care they require, combined with the low yields, make them incredibly scarce.
- Labor-Intensive Cultivation: Farmers invest significant time and effort in cultivating Densuke watermelons. Each melon is hand-pollinated and individually cared for to ensure optimal quality and size.
- Auction Culture: The first harvest of Densuke watermelons is traditionally sold at auction, where high demand from collectors and luxury fruit enthusiasts can drive prices up dramatically.
- Symbol of Luxury: Densuke watermelons have become a symbol of luxury and exclusivity in Japan. They are often given as extravagant gifts for special occasions or purchased by high-end restaurants and hotels.
- Taste and Quality: While taste is subjective, Densuke watermelons are known for their exceptional sweetness and texture. This, combined with their rarity, contributes to their high value.
Not all Densuke watermelons sell for thousands of dollars. The first few melons of the season often fetch the highest prices at auction, while later harvests may be sold at more reasonable prices in local markets and stores.
Where to Find Densuke Watermelons
The primary and exclusive source of Densuke watermelons is Hokkaido, Japan. During the summer harvest season (June-August), you may find them at:
- Local Markets: Visit farmers markets and fruit stands in Hokkaido for a chance to purchase Densuke watermelons.
- Department Stores: High-end department stores in major cities may carry Densuke watermelons, especially during peak season.
- Auctions: Keep an eye on news and announcements for special Densuke watermelon auctions, but be prepared for high prices.
- Specialty Fruit Shops: Some gourmet fruit shops might stock Densuke watermelons during the season.
In the U.S., you can find direct imports. While extremely rare, some specialty fruit importers in the U.S. might occasionally offer Densuke watermelons. These would be very expensive and might require pre-ordering.
How to Get Densuke Watermelon Seeds
Obtaining Densuke watermelon seeds in the US can be quite difficult, as they are tightly controlled by Japanese growers and rarely exported. However, there are a few options you can try:
- Online Retailers:
- Some online seed retailers, like Amazon or specialty seed shops, may list Densuke watermelon seeds. However, be cautious as these are often mislabeled or not true Densuke seeds. Research the seller’s reputation and reviews before purchasing.
- Look for seeds labeled as “heirloom” or “open-pollinated,” as these are more likely to be genuine.
- Seed Exchanges:
- Online seed exchange communities or forums may have members who are willing to trade or share Densuke seeds. These communities often have strict rules and regulations, so research and follow their guidelines.
- Local gardening clubs or seed libraries may also be a resource for finding rare seeds.
- Direct from Japan:
- If you have contacts or friends in Japan, you might be able to ask them to purchase and ship Densuke seeds to you. However, be aware of any import restrictions or regulations.
How to Grow Densuke Watermelons
Growing Densuke watermelons outside of Hokkaido, Japan, is challenging due to their specific climate and soil requirements. With careful attention and dedication, it’s possible to attempt cultivation in other regions:
- Obtaining Seeds:
- As mentioned previously, acquiring authentic Densuke seeds can be difficult. Use reputable sources and be wary of mislabeled seeds.
- Climate and Soil:
- Densuke watermelons thrive in warm temperatures (75-95°F) with plenty of sunlight. They prefer well-draining sandy or loamy soil rich in organic matter.
- Consider using a greenhouse or grow lights to create a controlled environment if your climate isn’t ideal.
- Starting Seeds:
- Start seeds indoors 4-6 weeks before the last frost. Use seed starting mix and keep soil consistently moist.
- Harden off seedlings gradually before transplanting outdoors.
- Planting Outdoors:
- Plant seedlings after the last frost when soil temperatures reach at least 70°F.
- Space plants 6 feet apart in rows 8 feet apart.
- Densuke watermelons are vine-like, so provide trellises or ample space for them to spread.
- Care and Maintenance:
- Water regularly, especially during flowering and fruit development.
- Fertilize with a balanced fertilizer throughout the growing season.
- Monitor for pests and diseases, and take appropriate action if necessary.
- Prune excess leaves and vines to promote air circulation and fruit development.
- Pollination:
- Densuke watermelons require hand-pollination for optimal fruit set. Learn how to identify male and female flowers and transfer pollen manually.
- Harvesting:
- Densuke watermelons take about 100 days to mature. Harvest when the tendril closest to the fruit turns brown and the rind develops a deep black color.
- Tap the melon gently; a hollow sound indicates ripeness.
When to Harvest Densuke Watermelons
Densuke watermelons typically take around 100 days to mature after planting. However, the exact time for harvest depends on various factors, including climate, weather conditions, and specific growing practices.
Here are some key indicators that a Densuke watermelon is ready for harvest:
- Tendril: The tendril closest to the fruit stem will turn brown and dry up.
- Rind: The rind will develop a deep, glossy black color without any green streaks.
- Sound: When you tap the melon gently with your knuckles, it should produce a deep, hollow sound.
- Field Spot: The spot where the melon rests on the ground will turn from white or yellow to creamy or yellow-brown.
- Weight: Densuke watermelons typically weigh between 13 to 20 pounds when ripe.
Harvest Season
In Hokkaido, Japan, where Densuke watermelons are exclusively grown, the harvest season typically runs from late June to early August. However, this can vary slightly depending on weather conditions during the growing season.
Tips for Harvesting
- Use a sharp knife or pruning shears to cut the stem, leaving a few inches attached to the melon.
- Handle the melon carefully to avoid bruising or damaging the rind.
- Allow the melon to rest at room temperature for a day or two before cutting and consuming it to allow the flavors to fully develop.
If you’re growing Densuke watermelons outside of Japan, the harvest time may vary depending on your local climate and growing conditions.
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Davin is a jack-of-all-trades but has professional training and experience in various home and garden subjects. He leans on other experts when needed and edits and fact-checks all articles.