'Clara Frijs' is an old Danish pear, and still one of the most popular varieties in Denmark. However, it does not seem to have had any circulation in other countries. This variety was first described by J. A. Bentzien in the Danish garden journal, Dansk Haugetidende, in 1858. Several trees of Clara Frijs were found by Count Carlsen in the Danish village of Skensved, but its true origin is unknown. The fruit of Clara Frijs is of medium size, about 115 grams (4 oz.) per fruit. The skin is very smooth, and highly resistant, if not immune, to russeting. The ground-color is bright green which later becomes a uniform yellow. It occasionally has a pink cheek. The fruit is fine in quality, very juicy, sweet, with good flavor. Doyenne du Comice and Clara Frijs are the highest priced pears in Denmark. In the variety trials at Blangstedgaard, Clara Frijs has been one of the most productive varieties, although it shows a tendency toward biennial bearing. Fruit thinning is often necessary. Its picking date is mid-September, some three weeks before Conference.
Clara Frijs is compatible with quince, and has for many years been commonly used as an interstock for incompatible pear varieties grafted on quince. This variety keeps well for about two months at 0?C. Longer storage reduces dessert quality. Fire blight is not known in Denmark, therefore nothing is known about its susceptibility to this disease. Most of the Clara Frijs trees in Denmark are infected with vein-yellows virus. However, virus-free material is being propagated by the State Department of Plant Pathology. Propagation material should be available within two or three years.?J. Vittrup Christensen, Blangstedgaard, Odense, Denmark. from: American Pomological Socitey, Fruit Varieties Journal, 1962.
Danish. Fruit medium to large, pale yellow, dotted; fleshwhite, melting, juicy,sugary, perfumed; good; August. -- The Pears of New York, 1921.
Important commercial cultivar in Sweden - 2002
Undamaged after -30 F in Cold Spring, Minnesotta.