Following The Grow Boss tips on YouTube "...yield is based on light, quality is based on growers talent" "...number one problem is, too much light, too much water, too many nutrients" Nutrients : (after having issues with nut burns, I decided to use Grow Boss's perfect ppm calculator) Invasion T (Glomus intraradices BEG72 and TRICHODERMA atrovide MUCL45632) 1g / plant Monster X mycorhizes (500 000 propaguls / Kg , made in vitro) 2g / 20cl then complete to make 1l Humic Fulvic Booster (humic and fulvic acids) 1ml / 1l Cannazym 2.5ml / 1l Rhizoponics 0.4ml/1l Lights: 2 x Adjust-A-Wings Avenger 600w HPS Lumatek 90000 Lumens 1000PAR 600w HPS Philips Son-t Green Power 95000 Lumens Soil:Platinium Royal Mix premium quality What is vapor pressure deficit? Often, marijuana growers who have their plants in indoor grow tents or rooms with artificial lighting, take into account parameters such as temperature and relative humidity to maximize plants growth and bloom, thus obtaining abundant harvest with top quality flowers. As we will see later, these factors affect different processes of the plant, such as transpiration or nutrient uptake. However, we usually forget about another important factor that is related to the aforementioned ones: vapor pressure deficit or VPD. Broadly speaking, VPD is the difference between the amount of water vapor that the atmosphere is able to retain (which depends on temperature) and the amount of water vapor contained in it (relative humidity). It is usually measured in kilopascals (kPa). Providing our plants with a correct relationship between temperature and relative moisture will keep us on the right VPD parameters, increasing the plant’s activity and thus improving its growth and showing its full potential during the flowering phase. The ideal would be to adjust both parameters (temperature and humidity) to get the best possible VPD value, so that the development of plants will be amazing.In the chart above you can see the right temperature and moisture values to maximize the development of cannabis plants. The green zone shows you optimal values of VPD, in which it would be ideal to maintain the environment. The orange zone shows correct values, in which plants should not have problems to develop normally. However, red areas show values in which your plants will be very far from hit their full potential, since the relation between temperature and moisture is not optimal. With relatively high values of VPD (between 5 and 12) plants tend to open their stomata and release a considerable amount of water vapor into the environment (increasing their transpiration). This increase in transpiration results in an increase in the plant’s photosynthetic activity, which will need more nutrients and will improve its overall growth, both during growth and bloom. The best range is between 7.5 and 10.5, which we have marked in green. However, we must be careful that VPD is not too high (dark red zone) since the plant would close its stomata to avoid releasing too much water vapor to the environment, which would result in fast dehydration due to excessive transpiration. On the other hand, if VPD is too low (light red zone), the plant will also close its stomata for not releasing more water into the atmosphere, which in this case would be already saturated (it would have reached the maximum water retention capacity in a specific temperature). In this way, reducing transpiration will also reduce photosynthesis, which has a direct impact on the plant’s development and yield. That way, VPD is essential when it comes to offer the best conditions for the development of plants, also to understand its water requirements according to the nutrients used and thus adjust them correctly to meet the grower’s expectations. N/B: SAY NO TO DRUGS -[Day 21]3rd week ending , everything is OK , just some lil nut burns on some of them but it's better than having deficiencies in the early stage ... 5 fans leaves coming out on the 3rd node , I'll wait until the 5th node to see if they stop pre-Veg at 7 fans or if they go up to 9 fans leaves to end pre-Veg . -[Day 29]5th week starting, got some good scalp. Flushing with Bud Flush to evacuate the salt , 10/12 plants are in healthy condition ( for the moment , keeping fingers crossed ) -[Day 30]Transplanted the baby's, added Invasion T (1g/plant), Monster X (2g/1l), Rhizoponics (0.4ml/1l), Humic Fulvic Booster (1ml/1l), Cannazym (2.5ml/1l), in water at pH 6.5, total ppm 898 -[Day 34]Finally transplanted into 5gal pot, the game is starting now ! Move on'up ! ( like Curtis says ) -[Day 35]Some plants start to have purpling stem, added Canna Mono MgO 1ml/1l for some of them -[Day 46]11/12 plants in healthy condition, Y Griega is still recovering from Mag def and can't stand under too much light , putting back under the MH in a low Lux spot with the lil ones -[Day 48]Having issues with a medical strain Y Griega, after many diagnoses and checking the roots (in perfect condition) that plant has proper Mg deficiency ! I should have noticed the way that she had grown compared to the others, with massive leaves , and I should have trust MedicalSeeds when they says that plant grow like a monster , I would have anticipated with adding Mg sooner ! -[Day 49]Starting the Scrogging -[Day 50]Spraying with Aminoweed (1ml/1l)Mobile scrog in position, ready to control the canopy -[Day 54]Water (1l in 5 gals pot) pH 6.5 + Rhizoponics 0.5ml/1l + Humic Fulvic 2ml/1l + Cannazym 2ml/1l + SensistarGrow (NPK Ca Mg all in 1 shit) 0.8ml/1l Total PPM: 800 -[Day 57]Water pH 6.5 (1l in 5 gals pot) -[Day 58]The 3 Super Skunk has filled up all the holes need to let each tops grow at least 2 nodes nowOG is a beast she is making tops everywhere The 3 Shiva's Skunk are very bunchie and are taking their time to fill up the space Y Griega ... I must learn Spanish to understand that plant 😅 -[Day 59]Watering andchecking ppm's drain to flush the plants if needed -[Day 60]3 plants flushed2 plants needs personal feedings ppm's checking still in progress -[Day 62]2 more plants needed a flush1 more plant needs personal feedingppm's checking in progress -[Day 63]another plant flushed ppm's checking almost done -[Day 64]All plants checked !Media under control ( around 1000ppm's for the big ones , around 800ppm's for the small ones )Canopy under control ( all at same level , will ScrOG the small ones if needed in 2 weeks ) -[Day 71]I could stay hours looking at them , watching the airflow wave moving their leaves 🍃 The time stop and all the stress of a shitty day fly away If your like me , just put one like 😉 -[Day 79]Starting trimming the legs, getting sticky fingers already, was very surprised 😳 -[Day 80]Finished trimming the legs , cutting the small "popcorn" shoots, no waste of energy. -[Day 82]Water pH 6.5 + Humic Fulvic 2ml/1l + Cannazym 2ml/1l + SensistarGrow 1ml/1l + Diamond Sugar 2ml/1l Total PPM: 1000ppm + Invasion T : - Glomus intraradices strain BEG 72 : 10 propagules/g - Trichoderma atroviride strain MUCL45632 : 10⁹ UFC/g 1gr (1 Million bacterias) / plants -Shiva2 -Shiva3 -Super Skunk 1 -[Day 85] 4th week of flowering starting, switching from Veg nootz to Bloom nootz. All plants had 1gr of Invasion T before 3th week ended. The 3 Super Skunk sugar leaves are getting sticky , the scent is a mix of Skunk with some kind of high sweety smell like Candy FLoss, sign of high sugar content 🍬🍭. -[Day 90] The plants are getting massive, not a lot of space left in the room, each pictures are token back against the wall or on top of a chair. The Super Skunk shall be ready first , the trichomes are visible without using a microscope, the scent is like an amazing candy floss coated with Skunk pee 😅Boerejongens quality @Home 😊