Each plant requires different levels of care, this can range from the amount of light to frequency of water. Below are some basic tips for making sure that your indoor plants stay healthy.
Pot Selection
Make sure that your pot has a drain hole in the bottom and a drip tray, alternatively make sure that the pot you choose, if sealed to avoid leaks, has adequate room to make sure that the plant's pot can be raised above the water in the base. The plants need to be able to drink the water but do not like sitting in water. In industry we suspend the pots above a water reservoir and use a wicking medium inserted into the pot to make sure that they can access the water.
Watering
If you overwater or underwater your plants you will most likely be coming back here to buy a new one! Each plant requires different levels of water and frequencies, as a guide - allow the top 2-3 centimetres of potting mix to dry out before watering again, if your plant is on a drip tray do not leave large amounts in the tray as most plants do not like having wet feet. We would normally recommend consistent watering at a 1-2 week interval, this will be dependent on where the plant is located and the type of plant. For example a plant in a darker location will not use as much water and it could be that you are only watering once every 4 weeks.
Feeding
Yes you can over feed your plants - over feeding can result in burning of the roots and or leaves depending on type of fertiliser. We use 2 main methods of fertilising. Liquid and Pelletised. The liquid feed is mixed in with water on a regular basis about every 3 months, pelletised or granular fertilisers are used every 6 months. These are spread over soil under the mulch layer and break down over time. It is also important to use a complete fertiliser on your indoor plants. The main elements that it should contain are Nitrogen - for green leaf growth, Phosphorus - to develop strong roots and Potassium - which encourages flowering and overall plant health.
Sunlight
Most indoor plants do not like to be placed in hot direct sunlight, a bright but indirect level is best for plants to thrive, some will cope with lower light levels or even just artificial light, such as the mothers-in-law tongue but they will not flourish. With your light also if the light source is mainly coming from one direction it is important to rotate your house plant and then to encourage the plant to continue to grow upright. A plant that is not rotated will grow towards the light and have a lopsided habit. By rotating you will have full more even growth.