Top 8 Black Diamond Watermelon Seeds – Fruit Plants & Seeds

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1. RDR Seeds

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50 Black Diamond Watermelon Seeds by RDR Seeds

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RDR Seeds #ad - To sow directly in garden plant 5 seeds per hill 1' apart with 4' between rows. Ensure soil does not dry out due to heat. Quintessential, king, whatever you want to call it, favorite, this watermelon is popular for a reason!.

Plant 3 seeds per pot about 1/4" deep and provide heat to about 80 degrees to increase germination. After seeds have germinated thin to one per pot. In areas with shorter growing seasons it is best to start watermelon seeds indoors to get a head start. This delicious watermelon averages 30-50 lbs, but sometimes gets as big as 75 lbs! Plants grow 12-18" tall. Black plastic on soil can aid in warming soil. Make sure to acclimate plants to the outdoors for several days prior to transplanting to harden them off. Seeds should germinate in 1-2 weeks. Requires healthy amounts of water and warm temperatures.
BrandRDR Seeds #ad
ManufacturerRDR Seeds #ad

2. LGKO

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Black Diamond Watermelons 20 Seeds

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LGKO #ad - Model: 20 seeds. In warmer climates this melon will start producing during the mid-season. Black diamond is bred to have a tough skin & large leaves that help to prevent sunburn. Black diamond melons are large, juicy and bright red.
BrandLGKO #ad

3. Isla's Garden Seeds

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Isla's Garden Seeds, Highest Quality, Black Diamond Watermelon Seeds, 85-90% Germination Rates, Non GMO, 50+ Premium Heirloom Seeds, ON Sale!

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Isla's Garden Seeds #ad - 85 days. Usda zones: 3, 4, 5, 6, 12 latin name: citrullus lanatus type: Open Pollinated, 11, 10, 9, 7, 8, Warm Season. Fantastic addition to your home garden! black diamond watermelon can grow to be 50 lbs. Produces nearly round 25 lb.

Average striped green watermelons with crimson flesh. Annual. 6-12" height. For more of isla's garden seed products, enter isla's garden seeds into your search bar on Amazon! Please submit a 5 star review to help the continued success of our Garden Seed Company! Please post pictures of your plants and review us! These are high quality seeds, be sure to fully research proper germination instructions for optimal germination rates.

5-6' spacing. These watermelons are so perfect for your home garden! A must buy and try! Seeds are great for Planting in Garden or for storing in a seed safe for emergency. Some level of previous experience comes in handy when growing this plant. Ensure that you are aware of the soil, sun, ph and water requirements for this plant and keep an eye out for pests.
BrandIsla's Garden Seeds #ad
ManufacturerIsla's Garden Seeds Company (Total Quality) #ad
Height2 Inches
Length3 Inches
Weight0.02 Pounds
Width0.25 Inches

4. Stonysoil Seed Company

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40 Heirloom Black Diamond Watermelon Seeds by Stonysoil Seed Comany

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Stonysoil Seed Company #ad - Grow some black diamonds in your own backyard. Packet contains 40 plus Seeds handpacked with heart and care by Stonysoil Seed Company. Thrives in high temperatures. Old time heirloom that is very sweet, can exceed 35 pounds but average 20 to 24 pounds. Thick black rind.
BrandStonysoil Seed Company #ad
ManufacturerStonysoil Seed Company #ad
ModelSSC380

5. SmartMe

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Fruit Seeds, Seeds 50 Black Diamond Watermelon Seeds Watermelon Flavor Easy to Grow Outdoor

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SmartMe #ad - Light: full sun fruit size: 30 to 50 pounds matures: 75 to 90 days Plant spacing: 36 to 60 inches apart Plant size: Long vine.
BrandSmartMe #ad
ManufacturerSmartMe #ad

6. David's Garden Seeds

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David's Garden Seeds Fruit Watermelon Black Diamond 1988 Red 50 Non-GMO, Heirloom Seeds

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David's Garden Seeds #ad - Fruits grow to 50 pounds or more. Harvest in about 80 days. Germination rate about 80% or better. Seeds are non-gmo and hand packed by David's Garden Seeds in the United States of America. Great texture, outstanding flavor.
BrandDavid's Garden Seeds #ad
ManufacturerDavid's Garden Seeds #ad
Height0.32 Inches
Length6 Inches
Width4 Inches
Part NumberDSVWAT111WAT
ModelDSVWAT111WAT

7. David's Garden Seeds

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Heirloom Seeds, David's Garden Seeds Fruit Watermelon Black Diamond Yellow Belly 6566 Red 50 Non-GMO

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David's Garden Seeds #ad - Good soil moisture is important in early stages of growth and during pollination when fruits are setting. Harvest in about 80 days. Germination rate about 80% or better. Seeds are non-gmo, easy to use and hand packed by David's Garden Seeds in the United States. Pro tip-a week before harvest do not water there is a chance you may dilute the natural sugars.
BrandDavid's Garden Seeds #ad
ManufacturerDavid's Garden Seeds #ad
Height0.32 Inches
Length6 Inches
Width4 Inches
Part NumberKW6566
ModelKW6566

8. COUNTRY CREEK ACRES GROWING IS IN OUR ROOTS

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Heirloom, Black Diamond, Super Sweet Round Melon, 25 Seeds, Watermelon

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COUNTRY CREEK ACRES GROWING IS IN OUR ROOTS #ad - Great producer--Lots of melons per Plant. Great tasting, Old Fashioned Watermelon Flavor. Most grocery stores Don't Stock This Variety. Better than Anything in the Store. Easy to grow large 30 to 50 Pound Melons.
BrandCOUNTRY CREEK ACRES GROWING IS IN OUR ROOTS #ad
ManufacturerCountry Creek LLC #ad
Height1 Inches
Length3 Inches
Weight0.19 Pounds
Width4 Inches
Part NumberWATERMELON, BLACK DIAMOND 25 seeds
ModelWATERMELON, BLACK DIAMOND 25 seeds
WarrantyWarranty is limited to the price paid for the seeds.