First year survival in plantings depends on a number of factors: vigor of planting stock; proper matching of species requirements and site characteristics; care of seedlings before and during planting; time of planting; vegetative competition and weather conditions before and after planting, particularly as they affect available soil moisture. Seedlings that die during the first year should probably be replaced the following spring to maintain a high level of stocking and potential income. Replanting should be done carefully with large, healthy seedlings. Special care helps maintain uniformity in tree size and minimize the number of years trees are harvested on a given planting site. Some growers provide extra stock for replanting by planting the entire area and then forming planting blocks (see section "Plantation Subdivision into Planting Blocks") by removing full rows of trees used for replanting.