I want to plant a cedar hedge along the front of my property. When is the best time to plant cedars?

Your can plant cedars at most times of year. The best is early spring, or fall when the plants are dormant, avoid times of very hot temperatures if possible. You can plant in fall anytime the ground is not frozen & still workable. The thing to remember is to dig large enough planting pocket, loosen the soil around so roots can penetrate, make sure you have good (amended with peat moss, manure & bone meal) soil, & that you have good drainage. If the soil does not drain well (i.e. clay or hard packed) good to put drain rock at bottom of planting pocket. Cedars like lots of water, but not to sit in it.