Photo by Melody

PlantFiles: Watermelon
Citrullus lanatus 'Cobb Gem'

Family: Cucurbitaceae (koo-ker-bih-TAY-see-ee) (Info)
Genus: Citrullus (SIT-ruh-lus) (Info)
Species: lanatus (la-NA-tus) (Info)
Cultivar: Cobb Gem
Additional cultivar information: (aka Kolb's Gem, State Fair, American Champion)
Hybridized by Kolb; Year of Registration or Introduction: circa 1880

» View all varieties of Melons


6-12 in. (15-30 cm)

12-15 ft. (3.6-4.7 m)

Sun Exposure:
Full Sun

Bloom Color:
Pale Yellow

Days to Maturity:
Unknown - Tell us

Other details:
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Propagation Methods:
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting:
Properly cleaned, seed can be successfully stored


No positives
1 neutral
No negatives

Gardeners' Notes:

Neutral Farmerdill On Nov 4, 2003, Farmerdill from Augusta, GA (Zone 8a) wrote:

This melon has been sold under all three names by different seed companies. It was the premier show melon prior to the introduction of Carolina Cross. It is a pretty melon which will grow to well over a hundred lbs. It won't win any prizes for taste. Seedfest gives an interesting history of this melon.


This plant has been said to grow in the following regions:

Barnesville, Ohio

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