Malheur yields average about 410 sacks per acre compared to 468 for the state. Substantial acreages also exist in the California portion of the Basin. With the exception of some 1300 acres of seed, Klamath stocks are grown almost exclusively for fresh market and marketed primarily in California. A small acreage is also used for chipping. For that reason, solid-set irrigation is widely used to not only grow the crop but also provide frost protection on cold nights.
Water is obtained primarily from the Klamath Lake system.
Despite a much shorter growing season, yields approach those of the Treasure Valley, averaging 400 sacks. Central Oregon Central Oregon growers produce about 1,500 acres primarily for the fresh market and 550 acres of seed. Production is heavily concentrated in Jefferson County in the Culver and Madras areas. Elevation averages from 3,000 to 4,000 feet. Consequently, because of the associated short growing season, average yields fall well below 400 sacks.