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I don't understand tucking fan leaves to give bud sites more light. Shouldn't it be the opposite?

DFWmd
DFWmdstarted grow question 6 months ago
Advice seems to be to tuck fan leaves so bud sites get more light. But don't plants work by light first going to leaves which send energy to flowers? A plant with leaves in shade and bud sites in light would do WORSE than v/v, right?
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Stickyone
Stickyoneanswered grow question 6 months ago
Tucking fan leaves in cannabis cultivation is a technique used to optimize light distribution and penetration within the canopy. While it may seem counterintuitive at first, tucking or removing some fan leaves can be beneficial for several reasons: Light Distribution: By tucking or removing fan leaves that are shading bud sites, you can ensure that more light reaches the lower parts of the plant where the potential bud sites are. This can help improve the overall yield and quality of your harvest. Air Circulation: Tucking leaves can also improve airflow within the canopy, reducing the risk of mold and mildew development, as well as promoting better overall plant health. Energy Allocation: Cannabis plants do require light for photosynthesis, which takes place primarily in the leaves. However, once energy is produced through photosynthesis, it is transported to different parts of the plant, including the flowers (buds). Tucking leaves doesn't stop the photosynthesis process; it redirects the energy flow to the areas that need it most, which are the developing buds. Pruning Strategy: Tucking fan leaves is often part of a broader pruning strategy that also includes selectively removing some leaves to improve light and airflow. This can help optimize the balance between energy production in the leaves and energy allocation to the buds. In summary, tucking fan leaves can help ensure that both leaves and bud sites receive an appropriate amount of light and energy. It's about creating a balance that maximizes the overall health and yield of your cannabis plants. However, it's essential to be mindful of not overpruning or removing too many leaves, as this can stress the plant. The specific approach may also depend on the strain and individual plant's needs, so it's a good practice to monitor your plants and adjust your techniques as necessary during the different growth stages.
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Organoman
Organomananswered grow question 6 months ago
Correct. Don't listen to internet warriors that think they know better than nature and hundreds of thousands years of evolution to perfect a design to peak performance.
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Roberts
Robertsanswered grow question 6 months ago
The light stimulates growth on the bud site if it is in the shade it doesn't get the full light. Thus not growing to a better potential. The plants need their leaves to produce energy to grow. Especially autoflowers. Selective defoliation if plant is bushy may be required.
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DFWmd
DFWmdanswered grow question 6 months ago
I think colas being at the top of the plant developing the most was selected via evolution because seed would be spread better with flowers up there than lower down and covered by leaves. People attribute that location as being closer to light (which it is) but maybe colas up there are best not because of light but because (if fertilized) then genetics more likely to be passed on. That is along the lines of what Jabrone was saying in regards to conflating light to local leaves being most important but people think it's the light to the flower. So, might a good scientific experiment be to have 900 cloned plants under the same conditions in every way except in 300 of them, via some magic, only colas are shaded and fan leaves are lit while in another 300 of them only colas are lit and fan leaves are shaded? The final third would just be as usual with light everywhere, as a control.
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Team_Ballsfor
Team_Ballsforanswered grow question 6 months ago
anything green on teh plant technically has chlorophyll but the concentration of that pigment is FAR greater in the top layers of fan leaves... even the underside of the leaves has some, but it far more attenuated than the top layers. Even less in stems and buds. The surface area of leaves is not an equivalent to surface area of buds relative to photosynthesis potential. Yes, you still get some, but it is far less just based on how much chlorophyl is present. Better off trying to get light to hit local leaves than the buds themselves. it'd be easy to confuse the results since getting light to hit the buds would also hit local leaves. one is evolutionarily honed to receive light and produce energy... the other is for reproduction. it's very unlikely the latter is more important in regard to receiving light. not saying it doesn't have an impact. but definitely sayingn some of that impact is misapplied since the light is also hitting local leaves. my money is on the leaves having a much larger impact of the two things occurring when peopel anecdotally say it helps. confusing cause and engaging in confirmation bias.
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AutoflowersSucK
AutoflowersSucKanswered grow question 6 months ago
Light trumps fan leaves.
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Team_Ballsfor
Team_Ballsforanswered grow question 6 months ago
depends on some factors, imo. if the axillary growth is getting lanky or the leaves are contorting, i'd rather get that future bud site a bit more light than it has received. But, i don't bend a fan leaf down too much, so it should still results in similar total energy received by the plant. I just did this with several plants, actually.. 10-15 minutes ago. The fan leaves are still roughly as far away as they were before, so no energy lost there. nothing pruned off... all win-win. Also, I use a scrog. so, a little stretch early on under that net is no big deal - just less for me to prune later. As it nears scrog i do start to tuck and shape as i can to get the terminal nodes into the light. May draw a fan leaf down an inch or some minimal amount. Canopy is still full and not letting light through to floor. would i have better results if i let those branches get more light early on? no idea. the way i grow, i have several weeks of solid vege growth to thicken up after that point. proportionally it is small potatoes to big picture. In this context there is benefit to getting it at scrog-height faster. sooner i can fill that out, the sooner i flip.. time is money. Definitely not lanky growth once at scrog level.
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Mr_Weeds_Autos
Mr_Weeds_Autosanswered grow question 6 months ago
Actually, buds do need the light that's the purpose of tucking the larger fan leaves that block them. The buds have chlorophyll-filled chloroplasts and hence need direct light to enhance photosynthesis. The buds also need access to the light to fatten up and enrich the cannabinoids, terpenes, and flavonoids.
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