Methods and systems of cultivation

A system for cultivating cannabis hydroponically, the system comprising:

• a first tray of a plurality of trays disposed at a first height;
• a second tray of the plurality of trays disposed at a second height, wherein the first height is different from the second height;
• a first nutrient mixture reservoir;
• and
• a pump coupled to the first nutrient mixture reservoir and each tray of the plurality of trays, wherein the pump is configured to deliver a first nutrient mixture to each tray of the plurality of trays.

A method of cultivating cannabis hydroponically, the method comprising:

• placing a first cannabis plant of a plurality of cannabis plants in a first tray of a plurality of trays;
• placing a second cannabis plant of the plurality of cannabis plants in a second tray of the plurality of trays, wherein:
• the first tray is disposed on a first shelf of a first rack system,
• the second tray is disposed on a second shelf of the first rack system,
• the first shelf is at a first height,
• the second shelf is at a second height, and
• the first height is different from the second height;
• flowing a first nutrient mixture from a first nutrient reservoir to the plurality of cannabis plants;
• returning a portion of the first nutrient mixture to the first nutrient reservoir after flowing the first nutrient mixture to the plurality of cannabis plants;
• exposing the plurality of cannabis plants to a first artificial light source having a first limited spectrum;
• growing on the first rack system each cannabis plant of the plurality of cannabis plants without producing flowers;
• transporting the plurality of trays from the first rack system to a second rack system;
• flowing a second nutrient mixture from a second nutrient reservoir to the plurality of cannabis plants;
• exposing the plurality of cannabis plants to a second artificial light source having a second limited spectrum, wherein the first limited spectrum comprises a different wavelength range than the second limited spectrum;
• and
• growing flowers on each cannabis plant of the plurality of cannabis plants on the second rack system.