Is this magnesium deficiency or something else?

My plants had a similar look. Your tips are dying and the yellowing. It seems to me like a combination of things. The pots also seem small in my opinion. That’s a lot of nutes, do they get enough light to efficiently use that much? I have 2 charts for you to compare.

i'm watching the leaves everytime i move around in the room lol. I kinda feel it is getting worse. I'll flush it once more and start with lower ppm, around 300-400

WindblownSquash said:

My plants had a similar look. Your tips are dying and the yellowing. It seems to me like a combination of things. The pots also seem small in my opinion. That’s a lot of nutes, do they get enough light to efficiently use that much? I have 2 charts for you to compare.

Click to expand...

I have saved these pics thanks and will actually look at them this time because in the past I have destroyed 3 plants in 1 week of flower so time to get the facts right. I'll get back to you once I can connect any dots together,

I haven't had a chance to read the whole thread but it seems theres more than a single issue here.

You're getting good advice from the seasoned growers here but just a couple more things to consider.

Light = food so inadequate light = inadequate feeding. 900ppms can absolutely work but only if the plants can uptake it.
The containers are also too small for the plants and the medium you've chosen.
Peat can be acidic especially when waterlogged so watch for this as well.
Sat. leaning hybrids can be a finicky and difficult to grow and even more difficult to finish properly.

The FNB GA isn't bad. I'm not crazy about the cal to mag ratio but its not terrible.
Guaranteed analysis: Total Nitrogen 4.0% (Ammoniacal Nitrogen 0.25%, Nitrate Nitrogen 3.75%); Available Phosphate 8.0%; Soluble Potash 7.0%; Calcium 4.0%; Magnesium 2.0%; Sulfur 2.0%; Chelated Iron 0.1%. Also contains non-plant food ingredient Humic Acids derived from leonardite 0.1%. Derived from: Ammonium Molybdate, Ammonium Phosphate, Calcium Nitrate, Potassium Nitrate, Potassium Phosphate, Potassium Borate, Magnesium Sulfate, Cobalt Sulfate, Copper Sulfate, Manganese Sulfate, Zinc Sulfate, Iron DTPA.

I'll come back in a bit and read through this and see where you're at.


And remember, no matter how many grows a gardener has completed, each round can teach us something new.

If you keep flushing and feeding, you're going to keep the soil too wet for too long. It kind of looks like over watering might be taking place.

UPDATE: I'm sorry for not getting back to you guys. I dont want anybody to think I bailed or I'm ignoring advices given here...just super busy in studies.

I went ahead and bought advanced sensi grow a+b series. It was expensive but if what they claim about ph is true then I dont mind. Personally it would make my life easier with everything going on. I did alot of research on various forums and it seems that general consensus is that advanced nutrients are super chelated and that using any sort of ph up or down will cause the ph to go off rail. I am watching for nutrient deficiencies this sativa is not taking it well. I'm not sure if its still ph issue or I got some disease going on. The leaves appear to be green with lighter green patches all over on the top foliage. I dont know what to do at this point...