concern in northern Oklahoma than it is in southern Okla-homa. Many successful orchards have been established using grafted nursery trees. Planting Pecan Trees February, March or early April is the best time to plant the trees. If buying grafted nursery stock, five to six foot trees are the best size. Select the best adapted varieties for your location. See F-6201, ‘Pecan Varieties for Oklahoma’. If the root system of the trees looks dry when the trees arrive, soak the roots in water for three to four hours before planting. The pecan tree is dormant at planting time, but it is extremely important to prevent drying out of the roots during or after setting. Damp burlap or other suitable cover should be used at planting time to prevent damage to the tree roots from exposure to sun or wind.