Cobb Gem Watermelon Seeds


Market price: $2.99
Our price: $2.49
Quantity Price
Quantity Out of stock

Citrullus lanatus

Cobb Gem Watermelon Seeds (100 days)

2 gram heirloom seed package.  About 16-20 seeds


Cobb Gem is one of the largest watermelons you could grow. 

If you are out to win the State Fair this in the one to grow. 

Easily weigh 120-130 pounds. 

Very heavy producer. 

Large gray-black seeds. 

The flesh is red

These melons are primarily grown for bragging rights. 

So if you want to win the county fair or just impress the folks on your block Cobb Gem is the watermelon for you.

The picture shows Rep. Frank Washburn at the 1963 Watermelon Festival in Tallahassee, Florida.  Frank paid $425 for this big 74 pound Cobb Gem watermelon!



Seed Planting Depth

Seeds per gram

Germination Temperature

Days to Germination

Row Spacing

Plant Spacing

100' Row Yield


1" 22-27 75-80 3-10 6' 3' 55 lb Full

Citrullus lanatus

Planting Tips:

In warmer climates, can be direct sown 1” deep once soil is above 75.  For cooler climates, start seedlings 2-3 weeks before last frost and place in final spacing of 3-4ft. on 6 ft. rows.  Loose, fertile soil in full sun will ensure a good crop.  For sweeter melons, reduce watering in the last month before harvest.

If direct seeding, don't plant seed till the soil temperature is 70 degrees or more.  Watermelons are originally from Africa and need heat to grow well.
If you do not have a long hot summer choose an organic variety that is quick to ripen. 
Because we want to get an early start we normally plant watermelon seed in four inch containers inside a greenhouse.

For Best Eating:  Water until the fruits are about the size of a tennis ball then only water if the plant totally dry.  The best tasting organic melons are concentrated in flavor because they are not over-watered.

Seeding Rate: 5,000 plants/acre, aproximately 1/2 lb.

Heirloom seeds are hardy but always take care with your garden seeds to give them the appropriate amount of moisture - not letting the vegetable seeds dry out prematurely or overwatering and possibly having them rot.


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