Growing vegetables indoor is for sure very different than growing them outdoor. I'd like to solicit your great ideas on how to gauge success of your indoor vegetable culture. Watering. Indoor gardening is no more demanding water than outdoor gardening. You may kill your indoor plants by overwatering if you water them the way you do outdoor. I know that I should not let the soil get dry out and not overwater it either. But how often should I check my plants and water them? I also know that different types of plants require different amount of water, for example, tomatoes and eggplants need more frequent watering than herbs. But can I water them only when they show a slight sign of thirsty? Pollination. Outside, plants are pollinated by insects and wind. Inside, you have to do the job by yourself. What is the most efficient way to do it? For peppers and eggplants, you can do manual pollination by hand or brush (it takes a lot of time to do it though). But for tomatoes and beans, the pollination is done inside the flower. Someone said that you have shake them every day, or use a small electric fan. Others said the frequency of shaking must be the same of the vibration of the bee's wing, so using an electric toothbrush is very effective. Lighting. No matter how much light a room has, growing vegetables indoor in winter season needs extra light due to the short day. What kinds of light is better for plants - fluorescent lights, sodium conversion bulb, or any light specially designed for plants? How many watts or lumens will be enough? Will too much light stunt the growth of the plants? This article describes an excellent method to measure lighting strength with a camera: http://pubs.caes.uga.edu/caespubs/pubcd/B1318/B1318.htm . I use a timer to control the lights and they will turn on and off automatically everyday. But I think it might be better if lights are controlled by a light sensor. Plants with fruit need more lights than leaf plants. So the position arrangement of indoor plants is very important. Humidity. Can humidity be a problem - particularly in the winter when it is very dry. What impact it will be on plants? How much the relative humidity should be maintained? Should we use a humidifier or just spray mist on plants? Will place plants close together help to create an environment with a higher relative humidity? Fertilization. Growing vegetables like tomatoes in containers need lot of fertilizers. Slow acting fertilizers like bone meal and blood meal are sometimes even not enough to meet their hungry needs. You'll need water soluble fertilizer. Some one even suggested that you have to fertilize them every time you water them. Will this kind of aggressive approach cause any problem? Liquid Seaweed/Kelp extract mixed with fish emulsion might be a good choice for a balanced nutrition. But fish emulsion smells and it is not proper for use indoor - at least I don't like the house smells fishy. What else organic fertilizer could be used? Temperature. Temperature and lighting are often related. Temperature directly under sunny window may become very hot during day and may fall drastically in the cold night. Will this severe fluctuation in temperature stun the plants? Using insulated LowE glazing can help a lot in control the temperature. It was said that LowE coating will block certain spectrum of light and will affect the plant growth. I was very hesitate in deciding whether to use LowE windows for the room to grow plants. But I am glad that I selected LowE windows. Further study shows that plants only use light in the visible spectrum and they do not need harmful UV or IR blocked LowE coating. Insects. Indoor plants has different kinds of pests. Fungus gnats are a nuisance to house. Adults may fly to every corner in the house. The larvae may damage the roots of the plant and may also spread of plant diseases. I tried yellow sticky cards, BT, and even vacuum, none of them is very effective. This year, I'll try a biological product, a beneficial insect-killing nematodes and see whether it works great. Another possible pest may be white flies. Although they are very small, they have piercing mouth parts which allow them to such plant sap. They are persistent and very hard to control once established. I found a good source for dealing with white flies: http://www.bugspray.com/article/whiteflies.html . This article mentioned a product called Bifen Foggers which is very effective but does not mention how toxic it is. I doubt that it is safe to use in house.