Q: I recently installed an underground fertilizer injector, and I was told to discontinue fertilizing by hand. Does this injector replace fertilizing plants by hand? Is it beneficial as a supplement?

Every garden needs periodic fertilization. “Designer” fertilizers are available for some kinds of plants, and so are fertilizers that you’re directed to apply at specified times throughout the season.

Every garden needs periodic fertilization. "Designer" fertilizers are available for some kinds of plants, and so are fertilizers that you're directed to apply at specified times throughout the season.