Download Free Vegetable Growing Guide PDF

Growing Ichiba Kouji Japanese Hybrid Melon in the Vegetable Garden

If you are starting seeds indoors, sow them about 4-6 weeks before the last expected frost date. Plant the seeds at a depth of about 0.5 to 1 inch. choose a well-draining, fertile soil in a sunny location. Once outdoor temperatures remain consistently above 65 F and the danger of frost has passed, you can transplant seedlings into the garden. If you prefer direct sowing outdoors, wait until the soil has warmed to at least 65-70 F. Place the seeds similarly at a depth of 0.5 to 1 inch and cover with fine soil, gently firming it down. Space plants 18-24 inches apart within a row, leaving 4-6 feet between rows, allowing ample room for the vigorous vines to sprawl.

Avoid soggy conditions by watering at ground level, aiming for about 1-2 inches of water per week, and use mulch to help retain moisture. Since these melons are heavy feeders, side-dress with compost or apply a balanced, slow-release organic fertilizer throughout the growing season. If you have limited space or prefer a tidier garden, you can train Ichiba Kouji vines to climb a trellis or sturdy support. This helps keep fruit off the ground, improves air circulation, and reduces pest or disease issues. As the vines grow, gently guide or tie them to the support using soft ties to prevent damage. Avoid temperatures below 50 F as growth slows significantly.

Pinch the primary stem at the 3rd leaf node to create two branches. Pinch off all third vines up to the 10th leaf node on these branches. Leave third vines between the 11th and 15th leaf nodes, and this is where two fruits will set. The total yield is four fruits per plant.

Harvesting Ichiba Kouji Japanese Hybrid Melon

You know these melons are ripe when the melon’s netting becomes more pronounced, and the rind may shift in color from green to a more subtle golden or cream hue. The blossom end should give slightly under gentle pressure, and a sweet, subtle aroma at the stem end is a good indicator of ripeness. If the melon slips easily from the vine when lifted or twisted gently, it is usually ready. To harvest, cut or twist the fruit carefully from the vine, taking care not to damage the stem if you plan to store it for a few extra days.

About Ichiba Kouji Japanese Hybrid Melon Garden Seeds

Bred for consistent quality, disease resistance, and superior flavor, these hybrid melons have become favorites for commercial and specialty gardeners.

Ichiba Kouji melons are prized in Japanese culture, often grown in meticulously controlled greenhouse environments and even given as luxurious gifts.

High in vitamins A and C and beneficial antioxidants, they’re a wholesome choice in the diet.

Most commonly, they are used fresh—sliced or cubed in fruit salads or enjoyed as a dessert melon—though some people also use them to make smoothies, sorbets, or chilled soups.

Tips From Our Gardeners

"If you have active pollinators in your area, you likely don’t need to worry about pollination. But, you can always do hand-pollinations in greenhouses or to ensure fruits set in any location."

- Lara Wadsworth, True Leaf Market Writer