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The Optimal Cannabis Flower Photoperiod: It’s not 12/12….

May 26 2023 – Danielle Daly

The Optimal Cannabis Flower Photoperiod:  It’s not 12/12….
The Optimal Cannabis Flower Photoperiod: It’s not 12/12….

Flower photoperiod research. Could 14 on + 10 off for 28 days…then 12/12 the last 28 days be the new flower standard? ⁣⁣⁣⁣
According to this study the results are an increase in yield and similar thc %. Net gain in total thc yield. One study is not conclusive - but it was well done and does make sense. ⁣14 on /10 off (for the duration of flowering) showed the most yield gains but largest thc % drop. ⁣⁣⁣
𝐓𝐡𝐞 𝐬𝐭𝐮𝐝𝐲 ⁣⁣⁣⁣
The three varieties used in the study were: 'Cannatonic,' a high CBD-accumulating line, as well as 'Northern Lights' and 'Hindu Kush,' two high THC varieties. ⁣
𝐑𝐞𝐬𝐮𝐥𝐭𝐬 ⁣⁣⁣⁣
The results showed differences between the three varieties in their response to different light treatments, with some significant yield increases in response to 14L. "Most significantly, the high-CBD line (Cannatonic) showed cannabinoid yield increased to more than double when an early 14L photoperiod was applied compared to the standard 12L. In contrast, one of the two high-THC lines tested (Northern Lights) only showed a 50% yield increase in the 14L < 12L treatment, whereas the second high-THC line tested (Hindu Kush) did not show any significant yield effects."⁣⁣⁣⁣
"In particular, cannabinoid yields can be more than doubled by increasing the photoperiod during the flowering phase from 12 h to 14 h, as demonstrated by the Cannatonic line. A 14L > 10L photoperiod also achieved a strong yield benefit which utilizes the same number of light hours as 12L and therefore incurs no extra electricity costs. 𝐅𝐨𝐫 𝐨𝐧𝐞 𝐡𝐢𝐠𝐡-𝐓𝐇𝐂 𝐥𝐢𝐧𝐞, 𝐚 𝟏𝟒𝐋 > 𝟏𝟐𝐋 𝐩𝐡𝐨𝐭𝐨𝐩𝐞𝐫𝐢𝐨𝐝 𝐢𝐧𝐜𝐫𝐞𝐚𝐬𝐞𝐝 𝐓𝐇𝐂 𝐲𝐢𝐞𝐥𝐝𝐬 𝐛𝐲 𝟒𝟗%, 𝐝𝐫𝐢𝐯𝐞𝐧 𝐛𝐲 𝐚 𝐠𝐚𝐢𝐧 𝐢𝐧 𝐛𝐢𝐨𝐦𝐚𝐬𝐬 𝐨𝐧𝐥𝐲 (𝐧𝐨 𝐜𝐡𝐚𝐧𝐠𝐞 𝐢𝐧 % 𝐓𝐇𝐂), 𝐰𝐡𝐞𝐫𝐞𝐚𝐬 𝐚 𝐬𝐞𝐜𝐨𝐧𝐝 𝐡𝐢𝐠𝐡-𝐓𝐇𝐂 𝐥𝐢𝐧𝐞 𝐝𝐢𝐝 𝐧𝐨𝐭 𝐬𝐡𝐨𝐰 𝐚𝐧𝐲 𝐬𝐢𝐠𝐧𝐢𝐟𝐢𝐜𝐚𝐧𝐭 𝐝𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐜𝐞𝐬. 𝐀𝐬 𝐭𝐡𝐢𝐬 𝐭𝐫𝐞𝐚𝐭𝐦𝐞𝐧𝐭 𝐚𝐥𝐬𝐨 𝐛𝐞𝐧𝐞𝐟𝐢𝐭𝐭𝐞𝐝 𝐂𝐚𝐧𝐧𝐚𝐭𝐨𝐧𝐢𝐜, 𝐭𝐡𝐢𝐬 𝐦𝐚𝐲 𝐛𝐞 𝐭𝐡𝐞 𝐛𝐞𝐬𝐭 '𝐚𝐥𝐥-𝐫𝐨𝐮𝐧𝐝' 𝐭𝐫𝐞𝐚𝐭𝐦𝐞𝐧𝐭 𝐨𝐩𝐭𝐢𝐦𝐚𝐥 𝐟𝐨𝐫 𝐦𝐢𝐱𝐞𝐝 𝐜𝐮𝐥𝐭𝐢𝐯𝐚𝐭𝐢𝐨𝐧 𝐚𝐧𝐝 𝐮𝐧𝐭𝐞𝐬𝐭𝐞𝐝 𝐯𝐚𝐫𝐢𝐞𝐭𝐢𝐞𝐬,"⁣




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