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Water pines regularly after planting to help establish strong roots. Pines require about 1 inch of water each week from either rain or home irrigation. Continue regular maintenance watering for the first two years of the plant's life.
Water it well. Water your pecan tree thoroughly immediately after planting it. For the first 6 months, water about 10 to 15 gallons (37.9 to 56.8 L) once a week. Do not water too much or too often, though, since you don't want keep them in a harmful soggy condition. Allow for approximately 35 feet (10.67 m) spacing between each pecan tree that you plant. 2  If trees are crowded, the faster growing tree will over-shadow a slower, stunt it and kill the shaded one eventually, hampering both trees' crops.