To both the dedicated perennial landscape gardener, and the more casual observer of trees, shrubs and groundcovers, it has shown itself to be a very hard, strange season for perennial plantings here in Colorado.
First, there was the November, 2014 freeze that struck at our Front Range landscapes before trees and shrubs had a chance to harden off fully for the winter. Following this, another sudden freeze on Mother’s Day, 2015 interrupted the budding stages of a number of plants; and then, there was a cooler, wetter-than-normal spring period. This was followed by a period of intense, dry heat through July and most of August.
These climatic factors conduce to intense plant stress. Whole trees, woody shrubs and tender perennials, or significant sections of them, have shown signs of withering and browning much earlier in the season than usual—or have not leafed out, or otherwise bloomed, at all, presenting bare patches along the borders of house lots, and in the trees lining local streets.
The good news is that all of this can be managed proactively, and gradually repaired.