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Mellifera Botanicals

Watermelon, Black Diamond

Watermelon, Black Diamond

Regular price $2.99 USD
Regular price Sale price $2.99 USD
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25+ ‘Black Diamond’ Watermelon Seeds

Citrullus lanatus var. lanatus

Non-GMO, Heirloom, Open-Pollinated

These giant, emerald green, ‘Black Diamond’ Watermelons have a tough skin and juicy, bright red interior. The plants sport large leaves and a drought tolerant behavior, producing watermelons mid-season in warmer climates. Fruits can grow to 30-50 pounds and are crisp and flavorful!

For cool climate gardeners, sow indoors in peat pots 1 month before transplanting outside 1 week after the last frost. For warm climates, direct sow outside when the soil temperature has warmed up to 75 degrees Fahrenheit; direct sow into 6-8” tall mounds of soil. Ideal germination temperature is 80-85 degrees Fahrenheit.
  • Life Cycle: Annual
  • Season: Warm Weather
  • Light: Full Sun
  • Seed Depth: ½”
  • Germination Time: 3 – 10 days
  • Germination Rate: 80%
  • Plant Spacing: 8”
  • Days to Maturity: 90
  • USDA Hardiness Zone: 3-12

All varieties are guaranteed to be authentic and grow true to type.

Thank you for supporting our family-owned, small business!

Share your experience growing these seeds with us on Instagram @MelliferaBotanicals

Shipping & Returns


Shipping charges for your order will be calculated and displayed at checkout. 

Free Shipping is automatically calculated for orders over $50.

All orders are processed within 2 to 5 business days (excluding weekends and holidays) after receiving your order confirmation email. You will receive another notification when your order has shipped. 

We are not responsible for any delays to your order after it leaves our facility.


Due to the nature of our products, we cannot accept returns.

In the event that your order arrives damaged in any way, please email us as soon as possible at with your order number and a photo of the item’s condition. We address these on a case-by-case basis but will try our best to work towards a satisfactory solution.

If you have any further questions, please don't hesitate to contact us at

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