The Olmecs were the first major civilization in Mexico following a progressive development in Soconusco. They lived in the tropical lowlands of south-central Mexico, in the present-day states of Veracruz and Tabasco. It has been speculated that Olmec derive in part from neighboring Mokaya and/or MixeâZoque.
One of the most common types of mechanical injury to dogwoods is impact from lawnmowers. Injuries of this type can invite basal stem rot disease and insect borer infestation. Similarly, string trimmer impact can sometimes bruise or girdle the cambium (the vital layer of tissue under the bark).
Good air circulation keeps pink flowering dogwoods healthy. Pink varieties of flowering dogwood (Cornus florida) such as Rubra and Prairie Pink brighten the garden each spring by filling their branches with pastel blossoms. In addition to their spring beauty, these trees provide berries for birds in the fall. Pink dogwoods grow best in U.S. Department of Agriculture plant hardiness zones 5 though 9 and prefer rich, well-drained soil that is slightly acidic. Although flowering dogwoods are susceptible to many diseases, planting and caring for them properly will help fend off many common problems.