You assume that this plant suffers from disease because there were signs of disease and although you saw insects, none of them were on the plant itself. Because there are symptoms on the leaves, stems and roots, you suspect that it is mainly a cow problem. It does not affect other plants in the landscape. Although you can send a sample to the National Clinic for Plant Diseases and Insects NC for a diagnosis of the disease, based on the facts collected, the bad cultural practices are probably involved. The location of the tree is a major concern. C. canadensis prefers well-drained soil and full partial sunlight, not in the shade.
If a house has very wide eaves, the plants can be planted under the eaves, but as these plantations are inside the drip line, they should be mulched. To retain moisture and watered during dry weather. Shrubs spaced properly may require a few years to be filled, but when these plantations are mature, they will not be overcrowded. Choosing a plant that is mature enough for planting reduces the need for over-size.
Provide intermediate spaces in the newly planted garden so that these open areas are not overgrown with weeds. One option is regular mulching with an organic material, such as pine fines, jagged leaves or double-hammered hardwood mulch. All of these mulches suppress weeds, appear attractive, retain moisture and protect and build healthy soil. Deficiencies can also be filled temporarily with annuals for a few years, provided they are not overcrowded or compete with permanent plantations. Do not over-populate plants during initial planting to create an "unstable landscape" (Figure 19-45).
The effective use of color can enlarge the space. The distant objects appear with a fine gray texture to the eye. The use of gray and fine-textured plants at the edge of the landscape can increase the apparent distance between the viewer and the plant. Tapering aisles or plantations towards a vanishing point can also create an illusion of distance. The use of strong colors and coarse textures in front of a border helps to enlarge the area. To make the space smaller, reverse this concept and use bright colors and coarse textures in the back and softer colors and finer textures at the front.