We have observed that Landsberg erecta does well at 23 C, whereas Columbia shows some signs of stress at this temperature. For plants to obtain maximal growth a balance of environmental conditions must be found that delays flowering yet produces rapid growth. We have observed that under an 8-h photoperiod plants grow large, but slowly. Whereas, under a 14-h photoperiod, plants grow more rapidly but flowering is induced early thus reducing leaf biomass. Numbers of individuals Figure 2.
Hydroponic culture can produce large amounts of root and shoot biomass.
Note the massive root systems produced by hydroponic culture. These roots would undoubtedly be restricted if grown in conventional pot or tray systems. The inflorescence is approximately 16 cm in height. The advantages of hydroponic culture have long been recognized in the production of larger and more uniform plants than those grown in soil. In addition, the excellent aeration of the root environment in hydroponic culture is considered a major factor that allows superior plant growth compared to soil grown plants.