Watermelon 'Blacktail Mountain'

Citrullus lanatus

Family: Cucurbitaceae (koo-ker-bih-TAY-see-ee) (Info)
Genus: Citrullus (SIT-ruh-lus) (Info)
Species: lanatus (la-NA-tus) (Info)
Cultivar: Blacktail Mountain
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36-48 in. (90-120 cm)

4-6 ft. (1.2-1.8 m)


15-18 in. (38-45 cm)

18-24 in. (45-60 cm)

24-36 in. (60-90 cm)

Sun Exposure:

Full Sun

Bloom Color:

Bright Yellow

Days to Maturity:

61 to 70 days

Other details:

Unknown - Tell us

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Propagation Methods:

From seed; sow indoors before last frost

From seed; direct sow after last frost

Seed Collecting:

Remove fleshy coating on seeds before storing

Allow unblemished fruit to ripen; clean and dry seeds

Ferment seeds before storing

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


This plant is said to grow outdoors in the following regions:

Glendale, Arizona

Tucson, Arizona

Mountain View, California

Miami, Florida

Brainerd, Minnesota

Wilsonville, Oregon

Marysville, Washington

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Gardeners' Notes:


On Sep 24, 2015, WeezyG from Brainerd, MN wrote:

I have tried 3 or 4 times before this to grow watermelons, and this is the first time I've had any success. I almost gave up on these because for the first month or so the vines didn't grow for me at all. But then, they decided to take off and I have 8 volleyball sized (or a bit larger) melons. I picked the first 2 a little too early, but they were still good. Just finished the 3rd one off and it was delicious. There a a couple more out in the garden that I think are ready, and a couple others that might not ripen before it freezes here, but I will definitely give these another try next year. I think I wasn't watering enough in the beginning, will try to do better with that next year.


On Mar 3, 2007, berrygirl from Braselton, GA (Zone 8a) wrote:

History: Developed by SSE member Glenn Drowns. He developed it when he lived in northern Idaho, where summer nights average 43 degrees!! SSE says it also does well in hot humid areas.


On Aug 2, 2005, JerseyGardener1 from Deal, NJ wrote:

Blacktail mountain is an extra early watermelon develops in Iowa USA by Glenn Drowns .... called "blacktail" because the seeds have a black marking at one end different from other watermelon seeds thus the "black tail". It is a small to medium sized (8-12 pounds) watermelon with standard pink flesh and dark green soild rind. It is one of the earliest watermelons in existence.... certainly one of the earliest heirlooms it ripens in (about) 70 days.


On Jul 2, 2005, PurplePansies from Deal, NJ (Zone 7a) wrote:

Blacktail mountain is an heirloom cultivar from the United States. It is supposed to be a smaller watermelon with good flavor. It is supposed to be early ripening. The name comes from the seeds which have characterisitc black "tails" or bumps on the ends. I am currently growing this variety so will not give rating untill harvest.