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Jayme Garden

Black Diamond Watermelon Seeds | Heirloom Non-GMO | 30-75 lb Fruit | Sweet Red Flesh | USDA Zones 3-10 |

Black Diamond Watermelon Seeds | Heirloom Non-GMO | 30-75 lb Fruit | Sweet Red Flesh | USDA Zones 3-10 |

Regular price $9.99 USD
Regular price Sale price $9.99 USD
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Seeds Quantity

Grow Black Diamond Watermelons from heirloom, non-GMO seeds! These massive melons have sweet, crisp red flesh and a tough, dark green rind. Weighing 30-75 lbs, they mature in 90 days and thrive in USDA zones 3-10. included!


  • Sweet & Crisp Flesh: Bright red, juicy, and flavorful flesh, perfect for summer snacks and desserts.
  • Massive Melons: Produces watermelons weighing 30-75 lbs, with a tough, bruise-resistant rind.
  • Heirloom Variety: A trusted favorite among gardeners and market growers since the 1950s.
  • Sunburn Protection: Large leaves and a tough rind help prevent sun damage.
  • Easy to Grow: Thrives in full sun, matures in 90 days, and grows well in warm climates.
  • Common Name: Black Diamond Watermelon
  • Scientific Name: Citrullus lanatus
  • USDA Zones: 3, 4, 5, 6, 7, 8, 9, 10
  • Color: Dark green rind, bright red flesh
  • Soil: Well-drained, fertile soil
  • Sunlight: Full sun
  • Watering: Regular, keep soil consistently moist
  • Planting Season: Warm season
  • Plant Type: Annual long vine
  • Features: Heirloom, large fruit, sunburn-resistant
  • Fruit Size: 30-75 lbs
  • Days to Maturity: 90 days
  • Plant Spacing: 18-36 inches
  • Planting Depth: 1 inch
  • Sowing Method: Start indoors or direct sow


Black Diamond Watermelon, Heirloom Watermelon, Non-GMO Seeds, Large Watermelon Seeds, Sweet Red Flesh, Zone 3-10 Plants, Warm Season Fruits, Garden Watermelon Seeds, Market Grower Seeds, Sunburn Resistant, 30-75 lb Melons, Easy Grow Watermelon, Summer Fruit Seeds

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If an item arrives damaged or not as described, you can request a refund by contacting our customer service team within a specified time frame. We may ask you to provide photos or other evidence of the damage. Once we receive your request and confirm the issue, we will process the refund as soon as possible.

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  • Refunds & Returns

    If an item arrives damaged or not as described, you can request a refund by contacting our customer service team within a specified time frame.

  • Quality Guarantee

    We ensure the quality of our products by using high-quality materials, and working with reputable suppliers.

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