Icebox Watermelon
Sugar Baby Watermelon is the compact powerhouse of the melon patch. This heirloom open-pollinated variety produces small, bowling-ball-shaped fruits weighing 8 to 12 pounds that mature in just 70 to 79 days from transplants, making it one of the earliest watermelons you can grow. Despite their petite size, these melons deliver the full sugar and sweetness of watermelons four times their weight, with bright red, fine-textured flesh packed into a thin, hard rind. Hardy from zones 3 to 13, Sugar Baby thrives in full sun and grows as a compact vine, fitting perfectly into small gardens, containers, and even your refrigerator.

Photo © True Leaf Market
Full Sun
High
3-13
18in H x 60in W
Annual
Moderate
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This variety earned its name honestly. The fruits reach just 6 to 8 inches across at maturity, small enough to nestle in a 7-gallon container or fit upright in an ice chest, yet they deliver mouthwatering sweetness that rivals full-sized melons. The thin, hard rind means these melons are susceptible to cracking when fully ripe, so checking frequently once they reach soccer-ball size ensures you harvest at peak flavor. The tight growth habit and early maturation make Sugar Baby exceptionally practical for northern gardeners and anyone working with limited space.
Sugar Baby melons are cut into slices for summer desserts and served chilled as a refreshing fruit course. Their compact size makes them ideal for whole-melon presentations at intimate gatherings, and they're frequently halved and scooped for fruit salads. The thin rind means minimal waste and easier portioning for families or small groups. Beyond the table, these melons are prized by gardeners specifically for their ability to store in standard refrigerators without requiring advance preparation or specialized handling, making them the practical choice for anyone seeking fresh homegrown watermelon without the commitment of larger varieties.
Sow indoors in biodegradable pots (2 to 3 inches) 4 weeks before your transplant date, planting 2 seeds per pot about 1/2 to 1 inch deep. Maintain soil temperature between 80°F and 90°F until germination, then reduce to 75°F for seedling growth. Handle young plants carefully as roots are sensitive to disturbance. One week before transplanting, reduce water and temperature to harden seedlings. Never allow soil to dry out.
Transplant when weather is frost-free, warm, and settled, spacing plants 2 to 3 feet apart in rows 6 to 8 feet apart. Soil temperature should be at least 60°F and ideally 70°F or warmer. Plant directly from biodegradable pots to minimize root disturbance. Consider using row covers for earlier crops and better yields, especially in the North, removing covers when female flowers appear.
Direct sow 2 weeks after the threat of frost has passed, when soil temperature reaches 70°F to 90°F. Plant seeds 1/2 inch deep and thin to 1 plant per mound when seedlings show 3 leaves.
Sugar Baby melons are ready to harvest when the tendril closest to the fruit dries and turns brown, or when the spot where the fruit rests on the ground turns yellow. Because these melons have a thin rind, check frequently once they reach the size of a soccer ball, as they're susceptible to cracking when fully ripe. Harvest in the cool of the day and chill quickly. Remember that watermelons will not ripen off the vine, so wait for full maturity before picking.
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“Sugar Baby stands as a time-honored heirloom variety, selected and refined by generations of gardeners who recognized the value of a watermelon that didn't demand sprawling space or endless summer days. Its development as a dwarf, early-maturing cultivar represents a deliberate breeding effort to democratize watermelon growing for gardeners with modest plots, cool climates, and small households. The variety has been preserved through open-pollinated seed saving, allowing home gardeners to collect and replant seeds year after year, cementing its role in the broader movement to maintain genetic diversity in food crops.”