Feed your evergreens in the early spring with a slow-release granular fertilizer designed just for them, like Vigoro Evergreen Fertilizer ($6, The Home Depot). In cold climates, water evergreens thoroughly before the soil freezes in late fall or winter. Because evergreens never go completely dormant, their roots will continue to draw water to counter drying winter winds.
Don't expect your evergreens to go through a growth spurt right away, but if you give them what they need to thrive, most of these varieties should grow by at least a foot each year. Eventually, even fast-growing evergreens will start to reach their full potential, so if you keep them in your yard for many years, you'll notice their growth slowing down over time.
If your trees reach a height that you're happy with but keep growing, you can also prune them back each year so they don't continue getting taller and wider.
Credit: Better Homes & Gardens