Indoor plants it doesn't mean that they don't requires sunlight. they also need 3-4 hours of indirect bright light. The best indirect bright light can be morning or evening sunlight. You can also place your plant near to brightest area of your location.

The soil mix required for most indoor plants are mix of peat moss, vermiculite, perlite, cocopeat, organic compost, sandyloam soil or garden soil. Remeber the soil should be well drained, fertile and rich in organic content.

Remember overwater can kill your plant. Water when the topsoil(2-3 inch) feels dry to touch. In general moderate watering(in every 3-4 days)

There is a details about the individual plant care in the description of each plants. So look at the descrption of selected plants for plant care guidelines.

Chlorophytum comosum, Parlour palm, All Ferns(Green & Golden Boston Fern), Ponytail palm, Areca palm, Pepromia, Table palm. Raphis palm etc.

All Aglaonema, Areca palm, All money plant, All Ficus plant, All Song of India, All Dracaena species, Chlorophytum comosum, All snake plants, Jade green, Crotons etc.

Eventhough they are indoor, they also need minimum 3-4 hours of indirect bright light to produce flowers. Plants like Peace lily, Bird of paradise, Heliconia, Kalanchoe, Anthurium, Chrysanthemum, Poinsettia, Orchid plants etc.

There is a sections in the Indoor plants about the Air-Purifer plants, you can look at that section for more details.

On average, an indoor plant will need repotting every 1-2 years to avoid it from becoming �pot bound� and to allow it to continue to grow and thrive. The best time to repot is during spring to give actively growing roots have enough time to grow into the fresh potting mix.

It is typically due to under watering, overwatering, or too much direct sunlight, try giving it some water and see if it perks up. Sometimes it's as easy as that. Most plants leaves will begin to wilt when they need watered.

It maybe due to when they're exposed to too much fertilizer or too many salts build up in the soil. Always follow the description of fertilizers before using it.