first grow let’s goo

Hello cannaman9, that looks like the early stage of a magnesium deficiency. If you fix the root of the problem, further yellowing and discoloration of the leaves should stop almost immediately. Some of the affected leaves may recover somewhat, but what’s most important is to make sure the problem isn’t continuing to spread to other leaves on the plant. Good luck with your project, I wish you all the best! 👽

it's probably Ph related or you've gone too far on the Calcium.. If it's one leaf.. Clip the one leaf problem solved ha haha :). If it's quite a few leaves it's definitely calcium the likelihood of seeing micro deficiencies in modern cannabis nutrients is crazy talk. So many people are using way too much. In my opinion it's got more to do with a Lack of balance then it does a lack of Boron. But good on you for trying to diagnose your cannabis plant. If you see damage in my diary it's 90% related to ph... And now your know because knowledge is power :).

I'm looking through your nutrients list, and if its correct, you are basically giving her 2 grow nutes, and 2 flower nutes.............this adds up to a lot of nutrients, I certainly wouldn't be using 2 full strength flower nutes at this stage of growth. I would stick with ONE type of nutrients, such as your canna coco, and follow the directions on the bottle. More nutrients does not equal more growth. Feed one type of nutrients at a normal or slighly reduced strength, and measure runoff ph to make sure your root zone is where it should be. Happy growing.

I would say its a toxicity, see how it recovers after your flush, and then keep watering with ph'ed water. The dark green leaves and curling of the edges makes me come to this conclusion. If possible, check the ph and PPM of your water runoff.

You definitely have a phosphorus and copper deficiency both together. Search for yourself on the net or YouTube for cannabis deficiencies and the difference between mobile and in mobile nutrients. Anyway long story short, when you flip to flower before hand typically a grower would use a preflower nutrient. One that has a small amount of nitrogen and higher than normal amounts of phosphorus and potassium. But especially the phosphorus before flowering in combination with copper, which is a micro nutrient and rare to have a problem with copper deficiency. Except in your case, your plant wants more phosphorus to set the bud sights during the stretching phase. It uses higher amounts than normal to do this along with copper, iron and silica. All three of these are mirco nutrients. N-P-K are your macro nutrients or top 3 mobile ones. So you have a phosphorus deficiency as indicated by the premature purpling between the veins of the leaves and filling out towards the edges, this is not to be confused with a magnesium deficiency which is indicated in the same patter except the plant would brown and yellow around the veins themselves which remain green and healthy. A copper deficiency is indicated by the curling of the tips and ends of the leaves. Both of these nutrients work in conjunction to create bud sights during early flower so remember always use more phosphorus before flowering and only before flower during the first and second weeks. Because what happened was, the plant tried to compensate for the lack of phosphorus and keep going with it and used up your copper as well. Again check into mobile and in mobile nutrients. Because the top 4 and only mobile nutrients N-p-k and magnesium are the most used nutrients. They are mobile meaning, they are stored in the lower and oldest leaves on the plant. So knowing the deficiency and toxicity early on will help you keep your plant healthy. Both well feed but always a bit hungry. You want to give your plant just enough N-p-k to keep it hungry but not over feed. Since the mobile nutrients are stored in the lower old leaves. You can tell if they have had to mantle nutes. The leaves around the bottom will be very dark green and curling down with a tiny brown tip on each end. If they have had too little, they will be yellowing and curling upward and not down. Feeding just right and the bottom leaves should be just a shade darker than the rest of the plant. Hope this helps you and happy growing.

Ph is too high, I would drop that down to 5.9-6.0 at this stage. Also I would only use the canna a and b with the 13-14 and maybe 0.5-1ml per litre cal mag. On some of the pics there are burnt tips which tends to be a overdose of nutrients so you might want to back them off a touch. I also agree with the other guy regarding there are some symptoms that look potassium related which could be due to the high ph. I would flush the medium with a low strength feed and measure the EC and PH of the run off, this will tell you where everything is at. Cover all bases, measure your run off and ph, drop the ph level to the amount mentioned above and go from there. In a perfect world I would probably try and drop the night temp a couple of degrees.

Ciao amico coltivatore secondo me e un sovra dosaggio di fertilizzante, calcio e potassio...se nn mi sbaglio

Buy a scope? They are cheap! And essential in this stage..

the first picture needs 2-3 weeks id say. the second picture looks kindle harvestable at the top but im guessing the lowers are even less mature. wait 2 weeks minimum imo

Not sure if ita been done. But put them back in the light n flush them for a week or 2.