Effects of Plant Size, Temperature, and Light Intensity on Flowering of Phalaenopsis Hybrids in Mediterranean Greenhouses

Figure 1

(a) References for duration, day/night temperatures, and light intensity for the different phases of cultivation of Phalaenopsis orchids in Mediterranean greenhouses. (b) Proposed changes for the optimization of the cultivation protocol. Reduced plant size () corresponds to 2 leaves fewer than the optimal sizes (); moderately lower regime () corresponds to a 2°C decrease compared to the standard thermal regime (); supplemental lighting () corresponds to a constant additional PPFD of 150 μmol m⁻² s⁻¹ for 6 hours per day compared to the reference light regime ().

(a)

(b)