Maximum Yield: With the new SANlight EVO-Series

Vegetative phase, day 1 - day 34

The three culture chambers were each filled with 12 seed plants of Cannabis Sativa L.. For each culture box, 6 plants of the genetics “Serious Kush” and 6 plants of the genetics “Serious Happiness” were used.

The plants were planted in a soil substrate, Plagron Grow Mix. For the first 10 days after germination, the plants were grown in 1L pots. On day 11 of the experiment, the plants were then repotted into 11L fabric pots.

During the experiment, the plants were fed with the complete range of fertilisers from Mills Nutrients. To ensure both uniform and continuous watering, all growing chambers were equipped with a central, automatic drip irrigation system. Throughout the vegetative phase, the temperature was kept at 25°C in the light phase, while at night the temperatures averaged 23°C. The humidity was kept at an average level of 25°C. Humidity was controlled to 70% on average.

Exposure Vegetative Phase Day 1 – Day 34

Nutrient supply Vegetative phase Day 1 – Day 34

Ø Temperature Day: 25°C, Ø Temperature night: 25°C, Ø Humidity: 70%

Generative phase, 1st flowering week, day 35- day 41

After 34 days of growth under 18h light per day, the exposure time was reduced to 12h per day, thus initiating the flowering phase. At the same time, the PPFDe values were increased to 500µmol/m²/s. The DLI was deliberately reduced from 25.92mol/m²/d to 21.6mol/m²/d in order not to inhibit the height growth of the plants too much.

Exposure Day 35 – Day 41

Nutrient supply Day 35 – Day 41

Ø Temperature Day: 27°C, Ø Temperature Night: 24°C, Ø Humidity: 60%

Generative phase, 2nd week of flowering, day 42 - day 48

Exposure Day 42 – Day 48

Nutrient supply Day 42 – Day 48

Ø Temperature Day: 27°C, Ø Temperature Night: 24°C, Ø Humidity: 60%

Generative phase, 4th week of flowering, day 56 - day 62

Exposure Day 56 – Day 62

Nutrient supply Day 56 – Day 62

Ø Temperature Day: 27°C, Ø Temperature Night: 24°C, Ø Humidity: 60%

Generative phase, 5th week of flowering, day 63 - day 69

Exposure Day 63 – Day 69

Nutrient supply Day 63 – Day 69

Ø Temperature Day: 27°C, Ø Temperature Night: 24°C, Ø Humidity: 60%

Generative phase, 6th week of flowering, day 70 - day 76

Exposure Day 70 – Day 76

Nutrient supply Day 70 – Day 76

Ø Temperature Day: 27°C, Ø Temperature Night: 24°C, Ø Humidity: 55%

Generative phase, 8th week of flowering, day 84 - day 90

Exposure Day 84 – Day 90

Nutrient supply Day 84 – Day 90

Ø Temperature Day: 27°C, Ø Temperature Night: 24°C, Ø Humidity: 50%, Note: Mould was found on 4 SK plants.

Generative phase, 9th week of flowering, day 91 - day 97

Exposure Day 91 – Day 97

Nutrient supply Day 91 – Day 97

Ø Temperature Day: 27°C, Ø Temperature Night: 24°C, Ø Humidity: 50%, Note: No other plants affected by mould.

Generative phase, 10th week of flowering, day 98 - day 104, harvest

Exposure Day 98 – Day 104

Nutrient supply Day 98 – Day 104 –>The plants were not watered for the last five days before harvest.

Ø Temperature Day: 25°C, Ø Temperature Night: 24°C, Ø Humidity: 50%.

After a successful flowering phase, the hemp plants were harvested. For documentation purposes, all larger leaves were removed from the plants.
The plants were first cut off whole and dried. Subsequently, the flowers were separated from the plant. The dry flowers were then trimmed by machine. Subsequently, the flowers were then finally dried at 20°C and 55% humidity. The flowers were sorted according to size (large and small flowers) and weighed.

Results

PPFDe >1,000µmol/m²/s leads to increased production per area with the SANlight EVO-Series. Outputs of up to 444W can be used per square metre without negative effects.

PPFDe = 700µmol/m²/s leads to the best yield per output (g/W) ratio. Outputs of 277W per square metre lead to economic production.

PPFDe >1,300µmol does not lead to bleaching in the tested strains.

At the time of harvest, only one plant in chamber no. 1 showed minimal signs of bleaching.