Watermelon Cultivars (K-M)

To cultivars (H-J, N-R)

Hundreds of watermelon cultivars have been developed for use in the U.S. over the last few centuries by public and private plant breeders.

Below, the following information (when available) is given for each cultivar: fruit photograph, cultivar name, experimental designation, breeder, vendor, parentage, characteristics, resistances, similar cultivars, adaptation, and year of release.


Kafir – Breeder: selected from African stock. Resistance: fusarium wilt, anthracnose. 1932.

Kengarden – Breeder: H. Mohr, University of Kentucky. Parentage: Dwarf Asahi Yamato?? x (dwarf Bush Desert King x breeding lines) x New Hampshire Midget. 1975.

Kleckley Resistant No. 6 (Fusarium Wilt Resistant Kleckley Sweet) – Breeder: Iowa State College, Ames. Vendor: Iowa Melon Growers Assn. Parentage: selection from Kleckley Sweet. Characteristics: exceptionally high quality, medium size Kleckley Sweet. Resistance: fusarium wilt. Similar: Kleckley Sweet. Adaptation: midwestern United States. Iowa Agr. Expt. Sta. Rpts. 1934, 1936. 1937.

Kleckley Resistant No.6 (synonyms Kleckley Sweet No.6, Pride of Muscatine?) – Breeder: Iowa State College. Parentage: selection from Kleckley Sweet. Characteristics: 30-35 lb. fruit with tough thin, dark green rind, red flesh; sweeter than Kleckley Sweet. Resistance: fusarium wilt (more resistant than Kleckley Sweet). Similar: Pride of Muscatine. 1937.

Kleckley Sweet (synonym Monte Cristo) – Breeder: W.A. Kleckley, Alabama. Parentage: possibly Boss x Arkansas Traveler. Characteristics: thin, glossy, dark green rind, large white seeds, medium-red flesh, oblong fruit, 25-40 lb. 1887.

Kleckley, Black – Breeder: Iowa. Parentage: Jugoslavia 7, Iowa Bell, Kleckley Sweet. Characteristics: darker rind than original Kleckley Sweet. 1945.

Klondike – Parentage: a mutation selected in California. Characteristics: blocky fruit, rind solid green with stripes, 20-25 lb., fine textured flesh. 1908.

Klondike No.3, Black Seeded – Breeder: Dept. Vegetable Crops, University of California, Davis. 1933.

Klondike R.S. 57 – Breeder and vendor: California Agr. Expt. Sta., Davis. Parentage: R 7 x Ironsides. Characteristics: tough rind, shipping type, high quality. Resistance: fusarium wilt. Similar: Blue Ribbon. Adaptation: California and southwestern United States. 1959.

Klondike R7 – Breeder: Mr. Porter, California. Parentage: Iowa Belle x Klondike. Characteristics: fruit 15 x 10 inch size, 20-25 lb.; thin, dark-green rind; sweet red flesh. Resistance: fusarium wilt. 1937.

Klondike Striped Blue Ribbon – Breeder: Mr. Porter, California. Parentage: Klondike R7 x Striped Klondike. Characteristics: thin tough rind, light green with narrow dark stripes, 15 x 10 inch size, 20-30 lb., sweet dark-red flesh. Resistance: fusarium wilt, anthracnose, sunburn. 1939.

Klondike WR – Breeder: Mr. Layton, California. Parentage: California Klondike 3 x Klondike R7. Characteristics: like Klondike, but sweeter. Resistance: fusarium wilt (better than Klondike). 1957.

Klondike WR 60 – Breeder: Mr. Layton, California. Parentage: California Klondike 3 x Klondike R7. 1958.

Kolb Gem – Breeder: R.F. Kolb, Alabama. Vendor: D.M. Ferry. 1885.

Leesburg – Breeder: Watermelon and Grape Investigations Laboratory, Florida Agr. Expt. Sta., Leesburg. Parentage: selection from Kleckley Sweet. Characteristics: very prolific, uniform, good internal quality, has a tendency to sunburn. Resistance: fusarium wilt. Similar: Kleckley Sweet. Adaptation: regional to southwestern United States. Fla. Agr. Expt. Sta. Bul. 288. 1936.

Long Mountain – Parentage: selection from Stone Mountain. 1936.

Louisiana Queen – Breeder: North Louisiana Experiment Station, Calhoun. Parentage: Summit x Fairfax. Characteristics: fruit similar in appearance to Dixie Queen and matures early, rind is tough and suitable for shipping, flesh is bright red, firm, crisp and sweet, fruit weigh approximately 20 lb. Resistance: fusarium wilt race 1. 1971.

Madera (XPH 960) – Breeder and vendor: Asgrow Seed Co. Characteristics: F1 hybrid, several days earlier than Crimson Sweet. Resistance: fusarium wilt (some strains) and anthracnose (race 1). Similar: Crimson Sweet. 1981.

Mardela Ice Box – Breeder: farmer who found it growing in Mardela, Md. Vendor: Otis S. Twilley, Salisbury, Md. Parentage: unknown. Similar: Early Arizona, but seems darker green. Adaptation: wide. 1954.

Mardi Gras (RWM 121) &endash; Breeder: T. Williams. Vendor: Rogers Seed. Characteristics: hybrid Allsweet type, few misshapen fruit, wide adaptability, high yield, 20-25 lb fruit weight, matures in 86-90 days, like Sangria. Resistance: anthracnose, fusarium wilt. Similar: Allsweet. 1997.

Market Midget – Breeder and vendor: New Hampshire Agr. Expt. Sta., Durham. Parentage: New Hampshire Midget x Winter Queen. Characteristics: early maturity; tough, leathery, thin rind of apple green color; white near stem; firm, sweet, bright-red flesh; relatively few small black seeds; can be stored several weeks and shipped. Adaptation: wide. N.H. Agr. Expt. Sta. Bul. No. 440. 1960.

Merrimack Sweetheart (Colebrook, Sweet Sugar, Yankee Queen) – Breeder: Dept. of Hort., Univ. of New Hampshire, Durham. Vendor: Merrimack Farmer’s Exchange. Parentage: selected from Japanese cultivar for local adaptation. Characteristics: earliness, adaptation to cooler weather conditions and high quality. Adaptation: regional to northern New England. 1935.

Mickylee (S83NW) – Breeder: Agric. Research and Education Center, University of Florida, Leesburg. Vendor: Hollar Seed Company, Petoseed Co. Parentage: Texas W5, Fairfax, Summit, and Graybelle. Characteristics: small, round 8-12 lb fruit with a rind pattern similar to that of Charleston Gray, very firm dark red flesh with a tough rind and small seeds. Resistance: fusarium wilt race 1, anthracnose race 1. PVP. 1986.

Miles – Breeder: Univ. of Tennessee, Jackson. Vendor: Associated Seed Growers. Parentage: Dixie Queen x Klondike R-7. Characteristics: small white seed, very high sugar content, oblong, small 20 to 25 pounds. Resistance: fusarium wilt. Adaptation: regionally, for home use in the southern United States. Tenn. Agr. Expt. Sta. Circ. 103. 1948.

Millionaire (HMX 7924) – Breeder and vendor: Harris Moran. Characteristics: triploid seedless hybrid, very prolific, similar in appearance to Tri-X-313, firm flesh, small seeds. 1992.

Minilee (F82NC) – Breeder: Agric. Research and Education Center, University of Florida, Leesburg. Vendor: Hollar and Co., Petoseed. Parentage: Texas W5, Fairfax, Summit, and Graybelle. Characteristics: small, round 5-8 lb fruit with a rind pattern similar to that of Charleston Gray, firm red flesh with a tough, thin rind and very small seeds. Resistance: fusarium wilt race 1, anthracnose race 1. PVP. 1986.

Mirage (XP 766) – Breeder and vendor: Asgrow Seed Co. Characteristics: F1 hybrid, Crimson Sweet type, but more uniform and productive. Resistance: fusarium wilt. Similar: Crimson Sweet and Jubilee. Adaptation: wide. 1977.

Missouri Queen – Breeder: Missouri Agr. Expt. Sta., Columbia. Parentage: selection from Dixie Queen. Resistance: fusarium wilt. Similar: Dixie Queen. Adaptation: same as Dixie Queen. Mo. Bul. No.502. 1948.