Hemp Grow - Pros and Cons

A single acre of hemp can produce as much material as six acres of trees. 
This is partially because a single acre of hemp can be harvested up to four times per year. 
The fibers of hemp can be used to replace the products made from trees - such as paper while adding a great deal of longevity - the Constitution is written on hemp paper.

Hemp can be grown in nearly any environment without the use of toxic chemicals, pesticides or the use of hazardous weed killer. 
The plant can survive with prolonged exposure to drought allowing farmers to still cultivate the crop even in some of the most barren of locations. 

One of the most intriguing uses for hemp is in cleaning up soil contamination. In the late 1990s industrial hemp was tested at the site of the Chernobyl nuclear disaster in Ukraine to help heal the soil. 
Because of its fast rate of growing each season, hemp shows good potential in cleaning up land contaminated with fly ash, sewage sludge, or other heavy metals--though hemp's use  is in its infancy.Hemp grows quite well outdoors.
However, hemp will ruin an outdoor medical marijuana grow. It will reduce the potency of the marijuana and decrease the THC of the medical plant.
If you do grow hemp, and it's cousin, marijuana, only an indoor marijuana grow will maintain it's THC. 
You might do well to invest in an indoor grow system. SuperCloset SuperFlower Stealth Grow Box Hydroponic System is an excellent place to start.
Considering the payout, for both the environment and our health, both are excellent to grow.