This is obviously quite a scientific question. We installed a fairly large number of plants in t backyard about 3.5 years ago. I met with the homeowners today to look at their frontyard projects. While there, we were looking at the condition of the backyard plants. Most of the plants look to be almost the exact same size as the day we installed them. All of the shrubs are on a drip irrigation system, which the homeowners have dutifully monitored. We even installed a 1100 gallon rain harvest system that they used during the water restriction times.
On the sunny side of the yard, we installed 3 Knock-Out roses, which they say have never been pruned. The roses are less than 3 feet tall.
In the shady areas there are groupings of azaleas, anise, Shasta viburnum, fothergilla, buckeye, cephalotaxus, oakleaf hydrangeas, daphne, and a few other plants.
The oakleafs are the happiest of the plants, but still fairly small after 3.5 years. 100% of the anise are dead. While there with