With the correct levels of water and light, you'll ensure that the plants you raise will turn into the best possible fully grown products possible. In addition, you can raise plants throughout the year, regardless of what season it is, when you equip an indoor area to act as your grow room.
Certain climates are especially inhospitable to outdoor growing, and those places in particular will enjoy the added benefit of continuous growing seasons with an indoor grow room. It's a given that you must possess or have access to an indoor space that is large enough to accommodate all of the plants that you plan to grow, and that could involve renting a space other than your home.
Assuming that you can find all of the space you need, you're going to have to lay down cash for some equipment that will enable you to grow plants indoors. Research the equipment that it takes to make plants grow under your roof, and with a little bit of research, you'll become familiar with the hardware that you'll have to invest in.
Explore the information available, either at the library or online, and you'll soon learn that there's a good deal of knowledge that has been posted by other growers and equipment providers. You'll likely find that the first major investment you'll have to make will be in LED grow lights; without these, most grow rooms cannot function very well.
Most indoor areas are too dark to grow plants without the aid of some electrical artificial lighting that stands in for sunlight. That's where the grow lights comes in, because it can simulate the natural light from the sun, except it can remain running as long as you need it to.
You never have to turn off your electric lighting, although in order to develop normally, plants do need times of darkness every day, much like humans do. You'll have to pay a fairly large chunk of money in your power bills, because electrical lighting for indoor gardening can really add up.
Air cooling equipment may also be an expense that you'll have to bear among your startup costs, particularly if you choose the hot-burning variety of electrical grow lights for your room. A surplus of heat will cause your plants to dry out and possibly die, so it's in your best interest to maintain a relatively moderate temperature when you're growing indoors.
While initial costs can be steep, you'll have the satisfaction of knowing that you built your own grow room, and are nurturing plants right underneath your own roof.