Household fertilizers usually contain a mixture of macro and micronutrients.
The three primary macronutrients are nitrogen, potassium, and phosphorus that are found in a container of fertilizer and listed as a ratio on the front of the bottle or bag.
Consequently, the ratio of these macronutrients in a tomato fertilizer or lawn fertilizer will be different than the ratio found in a house plant fertilizer since each of these groups has different nutritional requirements.
Therefore, you should specifically use a fertilizer that is formulated for house plants. And this should be the first thing that you look for in a house plant fertilizer. So take a look at the packaging at the front or back, and it should say “for houseplants” somewhere on the bottle. Phosphorus is also essential for flowering.
Therefore houseplant fertilizer for flowering plants should have a slightly higher amount of phosphorus included in the ingredient list. However, the houseplants that don’t produce flowers should have a higher concentration of nitrogen. They should also contain a bit of each of these nutrients.
So typically, you should use one house plant fertilizer for your flowering plants and a separate one for non-flowering plants. Lots of fertilizers also contain secondary macronutrients such as magnesium and calcium.
They may also contain micronutrients such as zinc, iron, and boron. Ultimately, you need to be sure that your house plant fertilizer contains even a small amount of these nutrients.