BOYSENBERRIES THORNY ( Nectarberry) are MUCH hardier than thornless varieties (. The Boysen originated in California and introduced in 1923 by Rudolph Boysen. Origin:  loganberry, various blackberries and some raspberries . Thorny canes are vigorous and trailing and require trellising. Very large ( 2-2 1/2 inch), non-shiny, dark maroon, practically seedless berries. Soft, very juicy flesh. Tangy flavor and delightful aroma. The Boysenberries have a distinctive, rich, tangy flavor and very aromatic. Excellent for eating fresh, juice, freezing, canning, pastries, and preserves. Ripens about July 1, and are among the largest of the small fruits. Vigorous, TRAILING vines. Boysenberries are hardy to approximately -10 degrees F. without protection. Hardy in zones 5-9.  1 gal. Size.