ScarfaceGuerrilla commented7y ago
Maximum Flower yield- from California Light Works, the end line says it- but proof them wrong man, nothing bad about that ;)
Pure flower matter yield can be favored by running fairly high red levels all the way through, a good starting point would be 80/20. This is the kind of growth pattern seen with HPS.
Goal#4 – Maximum Top-shelf flower yield.
This type of end product is the approach where having the ability to vary spectrum in all the different growth periods is most important, and where Hybrid Spectrum LED systems (individual Red/Blue/White control) significantly out perform all other types of lighting systems.
So a good starting point for this type of grow would be:
VEG: Depending on the inter-node spacing desired, decrease R/B ratio for shorter internodes, General recommendation: 60/40 for short tight internodes. This is the ratio found in the CLW VEG spectrum mix.
Pre-flower: To again reduce stretching, R/B ratio can be increased to 70/30 for the first 2 weeks of flower, or 75/25 for taller plants. Extra deep blue will stimulate additional pigments during this critical growth period enhancing flower colors and fragrance.
Flower: In this stage we want to maximize flower SIZE, so we will increase the Red/Blue ratio to 80/20. This is ratio that is found in the California LightWorks Full Cycle spectrum mix, or with the 550 series full on. Even higher Red ratios (by lowering the blue) can be used to further promote flower matter, but there can be a sacrifice in resin, fragrance, and secondary pigments. There is always a tradeoff between flower mass and resin (density) /cosmetic quality. We do not advise an R/B ratio above 90/10, and for no more than a week or two in the middle of peak flower, or it will impact resin and fragrance. And too low, (for example 60/40) during this critical period will promote excess leaf content in the flowers and a fluffier structure akin to outdoor flower.
Ripen: Here we look to again enhance resin and terpenes (fragrance) so we suggest lowering the R/B ratio back down to 70/30 or even 60/40 for the last 2 weeks. At this point the higher blue ratio will not alter the flower structure or promote excess bud leaves, because flower growth is winding down, and transitioning to resin production. Results in this phase of growth are very strain specific and can be influenced by nutrient changes as well, so you are encouraged to try small changes each harvest to slowly dial in your ideal.
UVB: IN this case UVB can be very important and it can be supplemented either the last 4-5 weeks, or even throughout the entire flower period to stimulate pigments and terpenes and most importantly THC. Note, UVB supplementation does NOT increase CBD levels.
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