What site factors influence optimum tree growth?
Soil – Physical soil factors, especially the degree of compaction, are commonly overlooked when selecting trees but likely have the greatest impact on tree survival, growth, and health. If the soil is very compact, select trees that tolerate low soil oxygen levels and be sure to loosen the soil around the planting hole. Soil pH – degree of acidity or alkalinity – is also important as it affects the availability of nutrients and the activity of soil microorganisms. Determine the soil pH of your site and choose a tree species that grows well in that range. Moisture – Either too much or too little water will limit tree growth. Determine the depth of the water table, preferably during the cool wet season, by digging several holes two to three feet deep and waiting three to four hours. If no water appears in the holes, any tree can be planted. If water accumulated, select species that tolerate wet sites (that is, low soil oxygen). If the water is less than 18 inches below the surface, plant
