Unless it is the middle of summer season and there has actually not sufficed rain, watering your outside plants is typically not required (or not really typically). Indoor plants rely on you as a source of water and additional nutrients in the kind of fertilizer. It is essential to understand the specific water and nutrient requirements of each plant to keep them healthy.
As pointed out, specific plants will need various quantities of water to keep them growing efficiently. With holes in the bottom of the pot or gravel inside the pot the soil and plant will soak up the needed water and the excess will run out through the bottom.
If you are utilizing tap water to water your plants there might be too much chlorine or salt present. Either choice is appropriate and might be the modification you require to make to grow much healthier plants.
Fertilizer includes nutrients and components that plants require to grow. Inside your home plants do not require as much fertilizer as their outside equivalents do. The spring or summertime time is the finest time to fertilize indoor plants.