When to start the PK?

I start to give Pk my Plants when they are in the second Week of Flower... Start to give everytime a little more until the fulldose+1

Start using pk after 3/4 flower weeks when ur plant has produced buds. Pk helps the buds fatten up. So use it until 2 weeks before harvest. Canna pk is really good!. Go to cannas website or google and search for canna nutrient calculator. They give u the most correct answer my friend! Good luck 😃 it’s the best way! Very easy to use

I agree. I think you should save your money for the PK booster. If the plant were bigger and the pot was small, and it looked hungry maybe. But you have an appropriate-sized pot and she looks healthy. You are going to get good buds without it I would just stick with whatever you are doing.

From about the second week of flowering. If you are referring to your most recent auto diaries, now would be when to start. Also, you should never grow at 24/0..........ALL cannabis plants NEED "sleep" for a correctly functioning metabolism and to finish their daily photosynthesis cycle. A plant with an incorrectly functioning metabolism will never produce the best quality flowers. 18/6 is optimal.

I suggest just following their directions, leaning on the light side of their concentration recommendations. For instance, I use General Hydroponics (TA) KoolBloom- which has a 2 phase liquid and dry ammendment. The liquid is used in transition and early flower to promote flowering and the dry is a "finishing" product that I skip personally. I haven't done any side by side comparisons to verify their effectiveness but I've been happy with my results using it.

Imo it’s not needed, a good feed will have everything it needs in good amounts. my grow shop guys have said they like to use it 2 weeks b4 flip and a few weeks into bloom. I can see it being useful if you only have a grow style nutrient but if u have grow and bloom i dont see the point.

also wanted to say that research is mesured in mg/L, which is not elemental ppm. 190mg/L is not 190ppm (elemental). Nutes are used per atom, not per gram.

P and K depend on active transpot to enter the plant. The plant releases 'carrier proteins' that only attach to specific molecules -- we have a similar system in our digestive system too. Only a small portion enters through mass flow - indiscriminately with water diffusing into roots. this is why recent studies show that after a certain point, there's no benefit to adding more P and K above critical levels around roots that make for unimpeded 'active transport' explained above. https://www.researchgate.net/publication/356286651_Optimisation_of_Nitrogen_Phosphorus_and_Potassium_for_Soilless_Production_of_Cannabis_sativa_in_the_Flowering_Stage_Using_Response_Surface_Analysis As an axample - it is not 100% proof and it explains its own limitations if you do read it. But, studies find you need the 'right' aboutn of p or k, not just add a shit ton and it magically gets better. There's a goldielocks zone that you want to maintain over time - even in vege. there are facets that impact these numbers a bit -- e.g. the type of N you provide can vary. This test is using N that requires microbes to break it down which explains why it's much higher than other suggestions for N. also is 190mg/L isn't elemental ppm. Your VPD will impact what you can amp it up to without toxicity symptoms. So, your garden will vary from another. The plant's health is your best guide without lab equipment. When you give too little or too much relative to rate of growth, the plant makes it obvious. read and react... go ahead, add your pk-booster, but take notes about timing and concentration... realize that symptoms may take weeks to show. if you consistenly have a burnt up canopy 5-7 weeks into flower or even sooner, realize it's likely the pk booster or otherwise due teo your choices of fertilization. Let the plant decide or you are doomed to burnt up plants in flower in perpetuity.

It all depends on the other fertilizers you use. If you have a bloom, it will be the last two weeks before rinsing. Without the bloom, you can start from the 3rd week of flowering. You should have the dosages written somewhere 😉✌️