Hydroponics for Vertical Trees

• Growing plants in a nutrient solution is called hydroponics. Riou/Pixland/Getty Images

  The science of hydroponics is growing plants in a nutrient solution instead of soil. Because the growth medium is strictly controlled, this leads to higher yields from plants. Many vining plants, such as tomatoes or cucumbers can be grown vertically, in essence forming trees. You can further your understanding of hydroponics by exploring how vertical trees can be grown using this technique.

Thin Film Method

• The thin film method relies on just a little bit of nutrient. This is also called the Nutrient Film Technique. This process flows a thin film of nutrient at the bottom of the hydroponic tank. The advantage of this system is that a lot of nutrient mix is not needed, which saves cost. You will have to engineer a system of supports for your trees, since they can grow quite heavy.

Top Feed System

• In the Top Feed System, plants are grown in large pots filled with clay balls, about the size of golf balls. Nutrient solution is fed to the top of the pots, and drained out the bottom. This method is a constant wet process, since nutrient is continuously being fed to the roots.

Top Bag System

• in this method, the tree is grown "upside down." The roots are in a bag filled with growing medium such as coconut husks or clay balls, and are suspended from the ceiling. The plant is allowed to grow down from the bag. Nutrient liquid is fed into the bag, and and timers and a valve release the nutrients into a holding tank when the bag is full. This method must be done correctly. The University of Hawaii states that incorrect root placement results in lower yields.

Ebb and Flow System

• The Ebb-and-Flow System is similar to the Top Feed System, but the flow rates are different. In the top feed system, a constant trickle flow is present. In the Ebb-and-Flow system, the container is filled up to the brim, then the nutrient is drained off. The end result is the roots are constantly being moistened. Experts state that the ebb and flow system is efficient for small plants, but do not recommend it for large plants over 24 inches in length. .