Onza is a personal-sized F1 watermelon hybrid that reaches harvest in just 87 days from transplants, making it one of the quickest options for home gardeners eager to taste homegrown fruit. This bush-type variety is specifically bred to resist Powdery Mildew, a common watermelon challenge in humid climates. With its compact growth habit and reliable performance, Onza fits naturally into smaller garden spaces while delivering the sweetness and refreshment watermelons are grown for. Space plants 6 to 8 feet apart in rows set 72 inches wide to give each vine room to sprawl.
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Onza delivers ripe fruit in just 87 days from transplants, making it remarkably quick for northern and short-season gardeners. The Powdery Mildew resistance removes one of the most frustrating barriers to consistent watermelon success, especially in humid regions where fungal pressure can derail the season. Its personal-sized stature and bush habit mean you get abundant smaller melons rather than waiting for one monster fruit, perfect for households that actually finish what they harvest.
Onza's personal size makes it ideal for eating fresh, sliced chilled on warm days, or halved for single servings. The compact nature of each fruit also suits small household refrigerators better than giant beefsteak varieties, reducing waste and making it practical for gardeners who live alone or have limited storage.
No timeline data available yet for this variety.
Sow seeds indoors in 50-cell plug trays or 2- to 3-inch peat pots in late April, no sooner than one month before your transplant date. Plant 2 seeds per cell or pot, pushing each seed 1/2 to 1 inch deep. Maintain soil temperature at 80 to 90 degrees Fahrenheit until germination occurs, then reduce to 75 degrees for seedling growth. Handle young plants with care and never allow soil to dry out during this stage. One week before transplanting, reduce both water and temperature slightly to harden off seedlings and prepare them for outdoor conditions.
Transplant outdoors only when weather is frost-free, warm, and settled. Space plants 2 to 3 feet apart in rows 6 to 8 feet apart, or thin to 1 plant per pot if started in individual containers. Ensure soil is warm and settled before moving seedlings to their permanent location.
Harvest Onza at 87 days from transplant or when fruits reach full maturity. Look for melons that feel heavy for their size and have a deep, uniform color characteristic of the variety. The rind should have a dull, slightly waxy appearance rather than a shiny surface, and the underside (where the melon rests on soil) should show a pale yellow or cream-colored spot. Cut melons from the vine using a sharp knife, leaving a short stem attached, rather than pulling by hand.
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