Originated from a cross of Sander x Lawrence
Plants are slightly thorny
Bushes have trailing canes
Fruit weight is 5 g
Berries have a conical shape
Fruiting habit - floricane fruiting (summer-bearing)
Begins to bloom in the third week of May
Harvest season starts in the second week of July
Productivity is 5 kg per plant
Soluble solids - 13.2%
Acidity - 1.56%
Cold hardiness is moderate
Country of origin - United States
Patent US Plant 8,423 dated October 19, 1993
Current status - obsolete or rarely used
Fruit clusters are medium large, borne on long stout stems which facilitate easy picking. Flower fertility is high and fruit druplets tend to fill out the berries completely. First flowers, which have white color, appear in the second week of May.
Fruit of Douglass ripens in mid-July about the same time as world-known Marion. The harvest period is about 20-28 days duration. The fruit varies in shape from bluntly cone shaped to bluntly pointed cylindrical. The length of the fruit usually exceeds its diameter by about 40% (28 mm length, 20 mm width). Fruit are medium in weight, 4-6 g avg., medium firm, glossy black color. Productivity compares with Marion.
Plants are moderately resistant to blackberry leaf and cane spot.
Douglass have survived winter temperatures of minus 15 C.
Download Douglass patent US00PP08423P