Too much shade and not enough sun
- Many shrubs require full sun for optimum growth.
- Sun-loving plants growing in partial sun or shade are unable to produce as much growth as a plant growing in the full sun due to reduced photosynthesis.
- Plants growing in shade will exhibit elongated spindly growth, with fewer side branches, and thin pale-colored or yellow leaves.
- Leaves are usually larger and thinner (providing more surface area for photosynthesis) than leaves of the same species growing in full sun.
- Often plants are grown in the shade of nearby trees. Tree roots compete with shrubs for available water and usually win, causing further stress on shrubs growing in the shade.
- Pruning to encourage branching and more compact growth may help to alleviate some problems. Consider pruning selected branches from nearby trees to allow more light to reach understory plants.
- The selection of shade-tolerant plants is the best way to overcome light-related problems.
- Shrubs that will tolerate deep shade to part shade are Japanese aucuba, drooping leucothoe, Japanese andromeda, mountain laurel, rhododendrons, and leatherleaf viburnum.
- Shrubs that will grow well in partial shade are oakleaf hydrangea, Virginia sweetspire, glossy abelia, inkberry, cherry laurel, sweetshrub, boxwood, fothergilla, and viburnum spp. However, even shade-tolerant plants will produce fewer flowers when grown in dense shade.