Photoperiod manipulation is a technique used to optimize plant growth by adjusting the duration of light and dark periods. This method has been experimented with for years, and one particular adjustment has shown significant improvements in plant growth and flowering rate.
The 21:36/12 PhotoperiodThe most effective photoperiod adjustment involves increasing the daylength to 21 hours and 36 minutes, with a 12-hour dark period. This adjustment should be made for 1 or 2 calendar weeks at the point of maximum flowering rate. To implement this schedule, you will need a 7-day, 24-hour digital timer.
Schedule for the 21:36/12 PhotoperiodHere is the schedule to follow during a 7-day calendar week:
- Day 1: Sunday, 6:00 am to Monday, 3:36 am
- Day 2: Monday, 3:36 pm to Tuesday, 1:12 pm
- Day 3: Wednesday, 1:12 am to Wednesday, 10:48 pm
- Day 4: Thursday, 10:48 am to Friday 8:24 am
- Day 5: Friday, 8:24 pm to Saturday 6:00 pm
Benefits of the 21:36/12 PhotoperiodUsing this photoperiod during peak flower production offers several advantages:
- Increased light energy: The total increase in light energy is almost 80%, which can result in larger yields if all other environmental conditions are optimal.
- Extended flowering period: The total increase in the flowering period is only 40%, which means there is still room for improvement.
- Efficient use of resources: Applying the 21:36/12 photoperiod for 1 or 2 weeks extends the wait by only 2 to 4 Earth days, allowing you to provide additional light energy without purchasing extra equipment or overloading existing circuits.