Fertilizing plants is almost a ritual with some growers.
Some just do it methodically at stated intervals without much regard for the
individual plant and its needs. Usually, growing plants flourish with biweekly
feedings of soluble fertilizer. Any well-known brands like Blossom Booster,
fish emulsion, Ra-Pid-Gro, Hyponex, Plant Marvel, or Ortho are good. Before you
fertilize, check the top-soil first to determine that it is moist. Fertilizer
poured onto dry soil could bum the feeder roots and the leaves may droop over
the edge of the pot. Never fertilizer plants during any period of rest or
dormancy.
Some growers prefer to alternate types of fertilizer, using
a chemical for one feeding, an organic type for the next. For instance, you
could alternate Ra-Pid-Gro and Atlas Fish Emulsion.
A lot of growers report great success using Blue Whale, a
mixture of shredded moss, seaweed, and ground whale parts. Simply sprinkle this
on the topsoil, then water it in.
Other related reads on indoor plant management:
Effective Ways to Water and Fertilize Your Indoor Plants
How Much Light Does Your Indoor Garden Need?