When to fertilize houseplants: gardeners dish the dos and don'ts

A houseplant in a yellow pot, with a small green scoop filled with brown fertilizer next to it and a round white empty plant pot.

If you're an attentive plant parent wondering when to fertilize houseplants, our experts will point you in the right direction. 

While most indoor greenery is fairly self-sufficient, your leafy friends will need more than a bright corner. Besides water, they'll need nutrients, too. Our gardening pros reveal when it's best to fertilize houseplants to help them thrive.