Green light is radiation with wavelengths between 520 and 560 nm and it affects photosynthesis, plant height, and flowering. Plants reflect green light and this is why they appear green to our eyes. As a result, some growers think that plants don’t use green wavelengths, but they actually do! In fact, only around 5 – 10% of green light is reflected from leaves and the rest (90 – 95 %) is absorbed or transmitted to lower leaves [1]. Green wavelengths get used in photosynthesis. Chlorophyll pigments absorb small amounts of green wavelengths. Light that doesn’t get absorbed is transmitted to leaves that are shaded out from direct light. This means that leaves at the bottom of the canopy get more green light than leaves at the top. A high proportion of green wavelengths compared to other colors tells lower leaves that they are being shaded out, so they are able to react accordingly. Lower leaves may react by opening or closing their stomata or growing longer stems that help the leaves reach brighter light [1, 2, 3]. When it comes to growing cannabis, many cultivators are interested in the quality of light used for the flowering stage. In many plants, flowering is regulated by two main photoreceptors: cryptochrome and phytochrome. Both photoreceptors primarily respond to blue light but can also respond to green, although to a lesser extent. Green can accelerate the start of flowering in several species (although cannabis has yet to be tested) [1, 4, 5]. However, once flowering has begun, it’s important to provide plants with a “full spectrum” light that has high amounts of blue and red light, and moderate amounts of green, in order for photosynthesis to be optimized. Green light mediates seed germination in some species. Seeds use green wavelengths to decide whether the environment is good for germination. Shade environments are enriched in green relative to red and blue light, so a plant can tell if it is shady or sunny. A seed that senses a shaded environment may stay dormant to avoid poor growing conditions [1]. Some examples of plant species where researchers have documented this response are: ryegrass (a grass that grows in tufts) and Chondrilla (a plant related to dandelion) [1, 6]. Although green wavelengths generally tell plants NOT to germinate, there are some exceptions! Surprisingly, green wavelengths can stimulate seed germination in some species like Aeschynomene, Tephrosia, Solidago, Cyrtopodium, and Atriplex [1, 6, 7]. Of course, light is not the only factor affecting seed germination – it’s a combination of many factors, such as soil moisture, soil type, temperature, photoperiod, and light quality. When combined with red and blue light, green can really enhance plant growth [1, 8]. However, too much green light (more than 50% of the total light) can actually reduce plant growth [8]. Based on the most current research, the ideal ratio of green, red, and blue light is thought to be around 1:2:1 for green:blue:red [9]. When choosing a horticultural light, choose one that has high amounts of blue and red light and moderate amounts of green and other colors of light. Not many studies can be found about the effect of green light on cannabis growth or metabolism. However, if one reads carefully, there are clues and data available even from the very early papers. Mahlberg and Hemphill (1983) used colored filters in their study to alter the sunlight spectrum and study green light among others. They concluded that the green filter, which makes the environment green by cutting other wavelengths out, reduced the THC concentration significantly compared to the daylight control treatment. It has been demonstrated that green color can reduce secondary metabolite activity with other species as well. For example, the addition of green to a light spectrum decreases anthocyanin concentration in lettuce (Zhang and Folta 2012). If green light only reverses the biosynthesis of some secondary metabolites, then why put green light into a growth spectrum at all? Well, there are a couple of good reasons. One is that green penetrates leaf layers effectively. Conversely red and blue light is almost completely absorbed by the first leaf layer. Green travels through the first, second, and even third layers effectively (Figure 2). Lower leaf layers can utilize green light in photosynthesis and therefore produce yields as well. Even though a green light-specific photoreceptor has not yet been found, it is known that green light has effects independent from the cryptochrome but then again, also cryptochrome-dependent ones, just like blue light. It is known that green light in low light intensity conditions can enhance far red stimulating secondary metabolite production in microgreens and then again, counteracts the production of these compounds in high-intensity light conditions (Kim et al. 2004). In many cases, green light promoted physiological changes in plants that are opposite to the actions of blue light. In the study by Kim et al. blue light-induced anthocyanin accumulation was inhibited by green light. In another study it has been found that blue light promotes stomatal opening whereas green light promotes stomatal closure (Frechilla et al. 2000). Blue light inhibits the early stem elongation in the seedling stage whereas green light promotes it (Folta 2004). Also, blue light results in flowering induction, and green light inhibits it (Banerjee et al., 2007). As you can see, green light works very closely with blue light, and therefore not only the amount of these two wavelengths separately is important but also the ratio (Blue: Green) between these two in the designed spectrum. Furthermore, green light has been found to affect the elongation of petioles and upward leaf reorientation with the model plant Arabidopsis thaliana both of which are a sign of shade avoidance symptoms (Zhang et al. 2011) and also gene expression in the same plant (Dhingra et al. 2006). As mentioned before, green light produces shade avoidance symptoms which are quite intuitive if you consider the natural conditions where the plants grow. Not all the green light is reflected from the highest canopy leaves in nature but a lot of it (50-90%) has been estimated to penetrate the upper leaves at the plant level ((Terashima et al., 2009; Nishio, 2000). For the plant growing in the understory of the forest green light is a signal for the plant of being in the shade of a bigger plant. Then again, the plants growing under unobstructed sunlight can take advantage of the green photons that can more easily penetrate the upper leaves than the red and blue photons. From the photosynthetic pigments in higher plants, chlorophyll is crucial for plant growth. Dissolved chlorophyll and absorb maximally in the red (λ600–700 nm) and blue (λ400–500 nm) regions of the spectrum and not as easily in the green (λ500–600 nm) regions. Up to 80% of all green light is thought to be transmitted through the chloroplast (Terashima et al., 2009) and this allows more green photons to pass deeper into the leaf mesophyll layer than red and blue photons. When the green light is scattered in the vertical leaf profile its journey is lengthened and therefore photons have a higher chance of hitting and being absorbed by chloroplasts on their passage through the leaf to the lower leaves of the plant. Photons of PPFD (photosynthetic photon flux density) are captured by chlorophyll causing an excitation of an electron to enter a higher energy state in which the energy is immediately passed on to the neighboring chlorophyll molecule by resonance transfer or released to the electron transport chain (PSII and PSI). Despite the low extinction coefficient of chlorophyll in the green 500–600 nm region it needs to be noted that the absorbance can be significant if the pigment (chlorophyll) concentration in the leaf is high enough. The research available clearly shows that plants use green wavelengths to promote higher biomass and yield (photosynthetic activity), and that it is a crucial signal for long-term developmental and short-term dynamic acclimation (Blue:Green ratio) to the environment. It should not be dismissed but studied more because it brings more opportunities to control plant gene expression and physiology in plant production. REFERENCES Banerjee R., Schleicher E., Meier S. Viana R. M., Pokorny R., Ahmad M., Bittl R., Batschauer. 2007. The signaling state of Arabidopsis cryptochrome 2 contains flavin semiquinone. The Journal of Biological Chemistry 282, 14916–14922. Dhingra, A., Bies, D. H., Lehner, K. R., and Folta, K. M. 2006. Green light adjusts the plastic transcriptome during early photomorphogenic development. Plant Physiol. 142, 1256-1266. Folta, K. M. 2004. Green light stimulates early stem elongation, antagonizing light-mediated growth inhibition. Plant Physiol. 135, 1407-1416. Frechilla, S., Talbott, L. D., Bogomolmi, R. A., and Zeiger, E. 2000. Reversal of blue light -stimulated stomatal opening by green light. Plant Cell Physiol. 41, 171-176. Kim, H.H., Goins, G. D., Wheeler, R. M., and Sager, J. C. 2004.Green-light supplementation for enhanced lettuce growth under red- and blue-light emitting diodes. HortScience 39, 1617-1622. Nishio, J.N. 2000. Why are higher plants green? Evolution of the higher plant photosynthetic pigment complement. Plant Cell and Environment 23, 539–548. Terashima I., Fujita T., Inoue T., Chow W.S., Oguchi R. 2009. Green light drives leaf photosynthesis more efficiently than red light in strong white light: revisiting the enigmatic question of why leaves are green. Plant & Cell Physiology 50, 684–697. Zhang, T., Maruhnich, S. A., and Folta, K. M. 2011. Green light induces shade avoidance symptoms. Plant Physiol. 157, 1528-156. Wang, Y. & Folta, K. M. Contributions of green light to plant growth and development. Am. J. Bot. 100, 70–78 (2013). Zhang, T. & Folta, K. M. Green light signaling and adaptive response. Plant Signal. Behav. 7, 75–78 (2012). Johkan, M. et al. Blue light-emitting diode light irradiation of seedlings improves seedling quality and growth after transplanting in red leaf lettuce. HortScience 45, 1809–1814 (2010). Kasajima, S., et al. Effect of Light Quality on Developmental Rate of Wheat under Continuous Light at a Constant Temperature. Plant Prod. Sci. 10, 286–291 (2007). Banerjee, R. et al. The signaling state of Arabidopsis cryptochrome 2 contains flavin semiquinone. J. Biol. Chem. 282, 14916–14922 (2007). Goggin, D. E. & Steadman, K. J. Blue and green are frequently seen: responses of seeds to short- and mid-wavelength light. Seed Sci. Res. 22, 27–35 (2012). Mandák, B. & Pyšek, P. The effects of light quality, nitrate concentration and presence of bracteoles on germination of different fruit types in the heterocarpous Atriplex sagittata. J. Ecol. 89, 149–158 (2001). Darko, E. et al. Photosynthesis under artificial light: the shift in primary and secondary metabolism. Philos. Trans. R. Soc. B Biol. Sci. 369 (2014). Lu, N. et al. Effects of Supplemental Lighting with Light-Emitting Diodes (LEDs) on Tomato Yield and Quality of Single-Truss Tomato Plants Grown at High Planting Density. Environ. Control Biol. 50, 63–74 (2012).

~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_ 12/20/21 🐱 The girls are behaving beautifully, color is uniform no issues whatsoever.. they do seem a little on the small side to me for week 6 but I might be staring too closely lol.. the new growth (at topping points) is approx. 1.5inch now. We cleaned bare the undersides of all plants (bottom 1/3) in preparation for flower..right or wrong we always start introducing mild bloom nutrients about a week before flower (I'd love to hear some opinions on this practice)..I think we'll start flower in week 8 but ultimately I'm going by the length of new growth, I'd like the new tops to be kinda long after their flowering stretch..thanks for reading if you made it this far and happy harvests everyone!!! ❤️💡🌱😽💨 ~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_ 12/22/21 😽💨 decided to flip anyway lol, being a 10+week strain I worry about our current supply running dangerously low in that time.. these should look great after their stretch 👌 ~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~

Que pasa familia, vamos con la cosecha de estas Gorilla Cookies Fast Flowering, de FastBuds. Por dónde empezar, las flores son bien compactas , y van repletas de resina, tienen tonos por dentro muy bonitos, y tiene un aroma a galleta. Es muy sencilla de cultivar, es de ciclo corto mdio aunque también si le dais una semana más no pasa nada agradecer se agradece al final. Mars hydro: Code discount: EL420 https://www.mars-hydro.com/ Agrobeta: https://www.agrobeta.com/agrobetatiendaonline/36-abonos-canamo Hasta aquí todo, Buenos humos 💨💨💨

Keep calm and smoke weed😎🔥

Day 1: Night humidity becoming difficult to control,decreased no of plants and improved air flow. Day 2 : Ph related leaf changes seen on leaves.water water. Day 3 : Add fruiting guano and supplement with 6 l of co2 during fans off time while lights on. Day 4 : Nute lock is resolving after flush.I reckon lights too close light burn mimicking nitrogen deficiency?? To use max ppfd of 900 to be safe. Day 5: Flowering tea ( pineapple peel,brown sugar,guano,basalt rock dust,kelp meal) smelling fermenty but sweet 😋..curious if I could drink it 🍺 Day 6 : Plants bouncing back,time to dial in Temps,humidity etc

12th Week Report 02/01/20 - 09/01/20 I was away from home for 1 week and everything was done on 07/01/20. 07/01/20 Luckly there is no mold and humidity now is stable at 55%. There is more or less half reservoir and I'm waiting to fill it, probably CMXL is almost ready to be flushed. Now CMXL is just fattening. As "planned" LSD got the final cut and from her undeveloped branches were trimmed just leaves without any pollen. When she will be dry, she will be used for making Hash/Butter. Last Update 07/01/20 See you guys ;)

Started this week out by super cropping the plant right above the fourth node. The next day the plant was pointed towards the light again, and after a few days I had to tie the top down or it would have been standing up straight again. Watering with 1L every 2-3 days.

the one at the back looks abit sad hopefully it perks up otherwise I’ll be using 4 cuttings instead of 3 think I need a new fan aswell you heard the creak onit

it rained a lot this week, and there was not much sun, it should stop raining in the coming days:) she is growing:) and she still has a lot of time :).

week two flower everything looks healthy :D today i defoliated them i watered them with 1.5l every 48h the light i use was set to 80% and it hangs 80cm away from the tops

Esto sigue creciendo aunque algo menos y floreciendo a buen ritmo. Crecimiento nº1 171 ctms y la nº4 147 ctms Una semana bastante pasada por agua y un final de semana también fresquita.

The infestation persisted, and the plant didn't need water despite disinfecting the closet..

Eccoci, questa è la ragazza che più sta crescendo di tutte! Può essere che forse è vicino all entrata di immissione del aria? Non penso, forse questa genetica a crescita veloce si sta facendo sentire, anche lei l ho toppata 4 volte per limitate la crescita in altezza, ma sto notando che è quella che ha il fusto più spesso e di conseguenza anche le foglie più sviluppate e l altezza in generale, vedremo come prosegue, ma prospetto un grande futuro per questa pianta! Magnifica genetica come sempre da Sweet seeds! Siete grandi! Un grande aiuto viene dall equipaggiamento Mars Hydro che continua a stupire, a come mantiene le temp /umidità stabili, mi sta regalando delle piante in ottima salute! Ci vediamo alal prossima settimana un abbraccio a tutti voi che vi fermate a guardare le mie ragazze! Buon 420 a tutti! E buon high! 😸👊💪🤞🍀🌱🌿🌲🧑‍🌾😎💚💖

Hello to you all, I am ready to harvest!!!! My purple lemonade is coming down today she looks absolutely adorable and gorgeous sticky and purple and just shining under the light like 🔮 crystals... We have a 14 day hang process and 14 day cure so I just hope I will be able to show you some real amazing pics 9f this beauty. I will do a pic with final harvest weight (dry) and also a final chapter and harvest on PURPLE LEMONADE BY 420FASTBUDS

Well 150 days wasted down the drain. I woke up and decided to check the girls this morning and found a fun Webbie surprise across the bugs. Looks like she managed to find some spider mites along the way. Had to biohazard the entire house and all of the plants. She got fed to the pigs because we had to dispose of that bitch ASAP. Been a long morning since we had to do all of the laundry I had to bleach all of the tent it’s a hard lesson to learn. I guess I must’ve gotten lazy keeping everything safe and sanitize between harvest. Lesson learned all around. Thankfully it’s not my first rodeo with these so we got the green cleaner on the way for the rest of the ladies.Been a long sad morning

11.29- the 4x4 went up yesterday with a brew new LED. all plants are happy since overnight, watered this morning. Older GDP id's showing me purple hues on sugar leaves, along with cannibalizing its lower fan leaves. The diary GDP is doing great as well, we are in the 5th week of flower, could not be happier. May brew a P K tea for the 5gal just to get it to end of flower, but no more dry nutes to either plant. The main diary plant is packing on weight, continuing to move leaves off of bud sites and tucking them under. All in all things are good, temp is very dropped in the tent (68f-74f) and RH is steady 35%-45%. More pictures to come as I will be going to the garage often to monitor environment. Thanks for reading all, it means a lot! Happy growing! 12.2-5gal is doing amazing. Deficiencies showing and buds/sugar leaves changing color to a purple hue. Quite cold in that tent at night, hovering around 61f. Minor defoliation performed 12.1 to remove some sickly leaves and provide light to lower canopy. Trichomes are appearing everywhere also. Time to stop thinking I'm doing something wrong and enjoy what this plant is providing. Next watering will help the plant get to the finish line for sure. *3gal not tracked on diary stats, but harvesting 12.7-12.9 on the full moon. Trichome check shows 50/50 clear to milky. Darkness will ensue 3-4 days before chop...i will also only be giving one more watering to the 3 gal of un PH'd water. Water for both again 12.3. Thank you for reading, please follow and visit my Instagram page! 12.4-last update to the week, plants were watered last night until very minor run off to the 5gal. Gave the 3 gal 1/2gal bottom watering but pot is still light. End is near, 3gal harvest officially on 12.8 in the AM. Gave the 5 gal some banana juice for P K, maybe this will help the obvious nutrient deficiencies this early yet in flower. Going to let this plant ride past the 8th week of flower to ensure its reached it's full potential. It's covered in trichomes though already and pulling from its leaves. I cant wait for the new pics tomorrow morning, start of the new week. Thanks for following along!

More yellow leaves. Took them Off. Smell getting stronger each day.

Servus Moin! Die Bluzcotti riecht wieder genau so wie ich sie in Erinnerung habe. Da läuft mir jetzt schon das Wasser im Mund zusammen.