In the Spring of 2016, we purchased 20 wooden flower planters to use in the initial phase of this project. Because of the cold, damp climate here in Milbridge, planters made from pressure treated wood appear to offer us the best affordability as well as a good ability to stand up to our cold, freezing winter temperatures while avoiding rot.
The planters must be large enough to keep them from drying out too quickly and to help prevent them from "disappearing."
Our advisors at America In Bloom suggested we use planters that are 36 inches square and 30 inches high. The filled weight of each planter is approximately 800 pounds. For reference, a half whiskey barrel type planter is 26 inches in diameter and 17 inches high.
The planters we used are constructed from pressure treated wood and cedar. The interior walls of the planters are lined in plastic sheeting (not visible once the planters are filled) to help reduce watering needs by reducing evaporation of moisture from the soil.
The bottoms of the planters are filled with crushed stone and topped with planting soil. Moisture retention beads and slow release fertilizers were placed in the soil of each planter before the planting was done.
The planters were sealed with weatherproofing stain in a charcoal gray color which was suggested to help make the plantings "pop" in the planters while also reducing the appearance of aging on the planters.