FruitWatermelon
Hime Kansen Watermelon
Hime Kansen is a Japanese hybrid watermelon bred to be a compact, refrigerator-friendly fruit that doesn't sacrifice flavor or quality. Growing in 90 to 99 days, this heat-loving annual produces slightly oblong melons weighing just 5 to 6 pounds, small enough to fit whole in a standard fridge yet packed with sweetness. The extremely thin rind makes it a breeze to slice, while its exceptional shipping ability means the fruit arrives at your table in pristine condition. Hardy across zones 3 through 13, it thrives in full sun and vining growth habit that can sprawl across garden beds or climb a trellis.
Photo © True Leaf Market
Growing Conditions
USDA Zone
3-13
Sunlight
Full Sun
Water
High
Soil
Well-drained, Fertile, Sandy Loam; Rich In Organic Matter
Growth Stats
18 in
Height
TypeVining
Spacing
36
Plant Profile
Sunlight
Full Sun
Water
High
Zones
3-13
Size
18in H x ?in W
Growth
—
Care
Moderate
Hover over chart points for details
Highlights
The standout feature of Hime Kansen is its remarkable balance of convenience and quality. At 5 to 6 pounds with a Brix count of 12.5 to 13, each melon delivers concentrated sweetness without the bulk of traditional watermelon varieties. The thin rind is both a practical advantage for eating and a selling point in Japanese specialty markets, where this cultivar has held pride of place for generations. Its ability to withstand shipping without compromising quality makes it as reliable for home gardeners as it is for commercial growers.
Common Uses
Hime Kansen watermelons are eaten fresh, sliced and served chilled as a refreshing dessert or light snack. The thin rind means less waste and easier preparation compared to standard watermelons. Their compact size and high sweetness make them ideal for smaller households, dinner parties, or anywhere you want to serve whole slices without excess fruit sitting around. The melon's excellent shipping ability also makes it a strong choice for farmers markets or direct sales.
Growing Timeline
No timeline data available yet for this variety.
Care Instructions
Transplant Outdoors
Transplant seedlings outdoors after all danger of frost has passed and soil temperature reaches at least 70 degrees Fahrenheit. Harden off seedlings by gradually exposing them to outdoor conditions over 7 to 10 days before planting. Space plants 36 inches apart.
Direct Sow
Direct sow seeds into warm soil after the last frost date, when soil temperature is consistently above 70 degrees Fahrenheit. Watermelon seeds germinate best in warm conditions.
Harvesting
Harvest Hime Kansen watermelons at 90 to 99 days after planting. Look for a creamy yellow or pale spot on the bottom where the melon rests on soil, a sign of maturity. The melon should feel slightly soft when pressed gently at the blossom end, and the vine connecting the stem should begin to brown and dry. Cut the melon from the vine with a sharp knife rather than pulling, which can damage the plant.
Pruning
Hime Kansen's vining growth habit can be managed by pinching back lateral vines to encourage the main vine to put energy into fruit production. If trellising, guide the main vine upward and remove excessive secondary vines. Limit fruit production to 2 to 3 melons per plant to ensure each reaches full size and sweetness.
Growing Calendar
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Companion Planting
Ecology & Traits
Edible
Scientific Classification
Citrullus vulgaris
Family
Cucurbitaceae
Genus
citrullus
Growth Habit
Vining
Native Status
L48 (I)PR (I)VI (I)
History & Origin
“Hime Kansen represents a deliberate breeding effort in Japanese horticulture to create a watermelon suited to modern living spaces and urban gardens. The name itself reflects this purpose: a compact, sophisticated melon designed for the Japanese home where space is at a premium and freshness is paramount. This hybrid has been a specialty crop in Japan for a long time, refined over many years to achieve the exact balance of size, sweetness, and rind thickness that home gardeners and specialty markets demand. It arrived in North American seed catalogs as interest in heirloom and specialty Asian vegetables grew, bringing with it the proven pedigree of Japanese fruit breeding.”