Here we go. Grow #5. This round I’ll be growing four Painkiller XLs by Royal Queen Seeds. It’s the first time I’m growing all of the same strain so I’m going to use the opportunity as an experiment. Here is the premise: It’s been stated by the President of Dyna-Gro (the nute line I use), that bloom nutrients with higher P and K values are not necessary for growing cannabis indoors, and that their Foliage-Pro product, along with Pro-Tekt is sufficient from start to finish. I’ve used this approach in the past and have had decent results. The question becomes, am I leaving anything on the table by not going the more conventional route and incorporating a bloom formula? So here is the plan. All four plants will be fed the same until the flip to a 12/12 light cycle. At that time I will feed two plants a mixture only Foliage-Pro and Pro-Tekt, and the other two will get a different mix that lessens the Foliage-Pro and adds Bloom and Mag-Pro.
I will feed the control plants Foliage-Pro and Pro-Tekt mixed to achieve a 7-2-5 NPK ratio during veg, and a 5-2-5 NPK ratio during flowering. This closely matches the data I complied from tissue samples published by Advanced Nutrients.
The test plants will be fed the same 7-2-5 NPK ratio during veg, but will be switched to a 3-5-5 NPK ratio during flowering. That mix was chosen from Dyna-Gro’s generic soil feeding schedule and is also close to Green House Seeds 1-2-2 NPK ratio that they use during their grow session videos on YouTube.
Ultimately the feed schedules will look something like this. The EC will be the same for both schedules, but arrived at using a different formula of products.
I realize that to have the best true comparison, all the plants should be clones instead of from seed, as to eliminate the variable of different phenotypes. I’ll just have to accept that variable and hope to get a general feel of which works best.
The particulars:
Seeds: Royal Queen Painkiller XL from Herbies
Growing Media: Pro Mix BX
Pots: 5 gallon fabric grow bags
Lights: 4 Mars Hydro Old Style 300w LEDs (140w actual draw each)
Tent: 32”x32”
Ventilation: 27” oscillating tower fan
Filtration: Carbon filter attached to a 240CFM fan vented to outside
Water: Reverse Osmosis, 11 PPM
Target PH: 6.2-6.8
Hope you join me in my Science Fair Project.
I will feed the control plants Foliage-Pro and Pro-Tekt mixed to achieve a 7-2-5 NPK ratio during veg, and a 5-2-5 NPK ratio during flowering. This closely matches the data I complied from tissue samples published by Advanced Nutrients.
The test plants will be fed the same 7-2-5 NPK ratio during veg, but will be switched to a 3-5-5 NPK ratio during flowering. That mix was chosen from Dyna-Gro’s generic soil feeding schedule and is also close to Green House Seeds 1-2-2 NPK ratio that they use during their grow session videos on YouTube.
Ultimately the feed schedules will look something like this. The EC will be the same for both schedules, but arrived at using a different formula of products.
I realize that to have the best true comparison, all the plants should be clones instead of from seed, as to eliminate the variable of different phenotypes. I’ll just have to accept that variable and hope to get a general feel of which works best.
The particulars:
Seeds: Royal Queen Painkiller XL from Herbies
Growing Media: Pro Mix BX
Pots: 5 gallon fabric grow bags
Lights: 4 Mars Hydro Old Style 300w LEDs (140w actual draw each)
Tent: 32”x32”
Ventilation: 27” oscillating tower fan
Filtration: Carbon filter attached to a 240CFM fan vented to outside
Water: Reverse Osmosis, 11 PPM
Target PH: 6.2-6.8
Hope you join me in my Science Fair Project.
