Mountain Valley Seed Company Black Diamond Watermelon Seeds
Best heirloom choice for home gardeners seeking high germination rates.
A classic, reliable heirloom variety known for its dark, distinctive rind and vibrant red interior. It is an excellent choice for gardeners looking for a traditional, open-pollinated melon that thrives in long, sunny growing seasons.
$9.27
at
Walmart
Who it's for
- Home gardeners looking to grow record-breaking, oversized summer fruit
- Southern growers dealing with intense heat and long summer seasons
- Families seeking a nostalgic and reliable backyard harvest
Who should skip it
- Urban gardeners or those with limited backyard planting space
- Northern gardeners facing short summers and early autumn frosts
- Novice growers who struggle with identifying harvest-ready fruit
Performance breakdown
Germination Reliability
High-quality heirloom genetics ensure consistent sprouting across the seed packet.
Heirloom Authenticity
True-to-type seeds preserve the classic Black Diamond flavor profile perfectly.
Growing Difficulty
Requires long, hot seasons and attentive moisture management for success.
Yield Potential
Produces heavy, reliable harvests when given ample space and sun.
Seed Viability
Open-pollinated status allows for easy seed saving for future seasons.
Transplant Success
Sensitive root systems demand careful handling during the indoor-to-outdoor transition.
Key Specs
Plant name
Watermelon
Plant category
Vegetables
Light needs
Full Sun
Plant lifecycle
Annual
Watering frequency
When Dry
Product net content uom
Ounce
Days to maturity
90 days
Know before you buy
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