Yellow leaves, spots on leaves

N Ca K deficiency for sure, mb P Mg too

Hey mate, For the white stuff underneath check your pH, if its 65% or higher you are risking to have mold. 24 degrees is completly fine, its perfect. If you can give her the same amount of DLI in a shorter time, I would add a longer night cycle. Helps them with everything literally. the brown spots are a calcium deficiency and the leaves seem to turn slightly light green. So you either have a wrong pH and therefore bad nutrient uptake or just not enough calcium at all. Good luck with it 👍

Hi bro. At this stage, your plant requires general nutrients such as calcium, magnesium, and phosphorus. Biobizz Nutrients Group offers an excellent cal-mag supplement, while Guanokalong Powder provides the best phosphorus for the flowering stage. Give it a try. Best of luck buddy.

Lazy leaf structure, looks like every leaf is just sitting around like a bunch of disorganized lazy workers. Just chilling. Water is responsible for turgor pressure, which is part of water cohesion within plant from root to leaf, when water is cycling efficiently leafs will be sharp, upright and have a disciplined look to them, it's not good or bad, simply a Indicator of how much work is being performed by a plant. As it deals with more moisture there is more suction created, this suction builds Into tension within the plant. When a plant's leafs look lazy and unsure it's a sign of not much is getting done in terms of total respiratory capacity. There is not much suction therefore not much water cycling. Your daytime temps are 70 which is far from optimal temperature for photosynthesis to occur in general.

Certainly looks like she is hungry for calcium and magnesium at very least. The reason why is a mystery tho. I trust you are being accurate with your rh on your diary? Do you know what your nighttime rh is going up to? You have been Feeding regularly so I don't expect it to be "hungry" for anything which make me suspicious this is something else disrupting uptake rather than a shortage Out of curiosity when you switched to flower did you keep same distance on your light? When we go from 18 hours to 12 there is alot less time to photostnthsize in daylight hours, this means intensity needs to be bumped up quite a bit for flowering due to more complex needs of making flowers we need as much juice as possible in shorter space of time. Leaf shape and size tell me she was getting enough light Intensity, then the demands of the environment caused a shortage in the supply chain as supply couldn't keep up with demand, your feeding schedule tells me you have been Feeding enough. Your not coco right? Lol normally wrack brain for 20 min then realize they were growing in coco whole time and that changes everything. Check ph. First and foremost. Let us know if she is in range.

Also i see the photo with the leaf lifted up with some white spots could be the beginning of powdery mildew. Make sure to let the soil go thru dry phases durring mid and late flower the plant can Handel the dirt getting dry at this point unlike durring the strech the plant also likes going thru dry patchs every once in awhile. It causes some stress but when it gets watered it gets stronger from the stress now don't let it drop down or anything maybe try nit watering front the top the next time you water. Put like 2 or 3on of water in your tub and put the plants in the tub for a few min just enough where it will wick up enough water to live not enough to soak the whole bottom half of the pot. Then wait till the soil gets really dry then water normal again. Will also help bring down the humidity in the tent. Keep exhaust fan on high all the time ossilating fans anything that will bring the humidity down will help get rid if powdery mildew Now if those white spots are moving there are a few things it could be

There could be a few things going on with your cannabis plants. Nutrient deficiencies, especially with things like calcium and magnesium, can cause spots on the leaves. You might also have pests or diseases like powdery mildew. Alright, yellow and rusty spots narrows things down a bit. It sounds like you might have a nutrient deficiency, specifically with magnesium. Or, you could be dealing with a fungal infection called rust. There could be a few things going on. Sometimes, plants lose leaves because they don't have enough water, or maybe they're getting too much.

Also it's time to start ramping up your umol,s for the lighting. It's possible some of the lower leaves turning yellow are just bunched up together and some are not getting enough light maybe cut a few fan leaves out of the middle of the plant and let some airflow thru the whole thing

Hey there no need to worry we can get this figured out 1st the leaves are a little shinny so prob need to back off the nitrogen 2nd the crisp leaves and suck your either not watering often enough or you should check the ph of the run off water . If oh is off then run some water thru it ph to 6.4 and should help turn around re apply rules after a little flush if you do