Spinach Handbook

Set Points

Temperature
Recommended Set-Point: 24^oC (75^oF) Daytime 18.8^oC (65^oF) Nighttime

Relative Humidity
Recommended Set-Point: 30% to 70%

Carbon Dioxide Concentration
Recommended Set-Point: 1000 ppm when light is available for photosynthesis and ambient levels during dark hours

Light
Recommended Set-Point: Up to 17 moles/m2/day as a combination of solar and supplemental light (see photoperiod)

Dissolved Oxygen (DO)
Recommended Set-Point: above 4 mg/L or 4 ppm in the nutrient solution

pH
Recommended Set-Point: 5.8

Electrical Conductivity (EC)
Recommended Set-Point: 1.2 milliSiemens/cm

Photoperiod
Recommended Set-Point: a maximum of 16 hrs of light to prevent early bolting