These resources are brought to you by the Cooperative Extension System and your Local Institution
Welcome
eXtension is an interactive learning environment delivering the best, most researched knowledge from the smartest land-grant university minds across America.
Have a question? Try asking one of our Experts
I'm helping a high school plant two 35-foot-by-6 foot-by-3-foot-high brick planters in front of the school. They are already filled with soil, but a landscaper thought we should insulate the inside edges with foam insulation board. Is this necessary? Would it help perennials overwinter?
Last Updated: December 17, 2007
The insulation might help prevent perennials from freezing out during the winter, but it won't guarantee that they'll survive. Perennials would have a better chance of surviving if planted in the ground.
You might want to experiment by insulating one and not the other. It might be an interesting experiment for science classes to keep statistics on the survival rate of each planter over a period of years.
Have a specific question? Try asking one of our Experts
Unlike most other resources on the web, we have experts from Universities around the country ready to answer your questions.
