Newby out his debth Help needed?

Spot Nitrogen Deficiency with Marijuana and Recover in a Week!

Growing in coco can have its disadvantages. One being ph swings. If you're using the proper amount of nutrients, it might be worth looking into the ph of the medium instead of what you're putting in it. If this happens to be the issue, You can buy some dolomite lime and mix it at a ratio of about half 1 teaspoon per gallon of water. You want to then mix in a chelating agent like molasses. This will make the lime stick to and become available to the plant easily. This will correct your ph and should regulate future ph issues for a while.

If you've ph'd your medium and found it within the correct ratio, then it could be a simple fact of nutrients. She is looking a little down as well. Ph can cause this if its locked out enough. It could also be under watered from the looks of it. I see a few leaves that look dry and brittle.

There are a lot of things that could be going wrong here. I suggest starting from the bottom up by making sure the ph not only in the water but the medium are within the correct range.

 

Do not add lime, that will raise your ph. Did you restore the calcium and magnesium cations after flushing by feeding with 1/4 strength nutes, heavy in cal mag? You should always feed a ph range in coco. 5.7-6.3 are the extremes. The reason being there’s a barrier at 6.0 for some micronutrients, you need to work both sides

 

Lime no. It is not the same as normal lime....



Dolomite lime is used all the time to normalise ph

Quote

Dolomite is added to growing medium to raise pH to the range of 5.5 to 6.5 and to supply plants with calcium and magnesium needed for healthy growth.



Effects of Dolomite Source, Dolomite Rate and Fertilizer Rate on Change in pH of Growing Medium
Leachate

There are 3 ways to check ph. You can check your medium with a specific ph meter, you check the ph of the water you put in and then you can check whats called the runoff. If you dont have the meter to check your medium, check your runoff. When you check the runoff, its a good idea to check the ppm of your source and runoff as well. Thats another meter.

What i was suggesting sst the beginning was to add dolomite fo an easy fix. It wont harm your plant and if it goes back to normal, you know what the problem was. If it doesnt fix it then it rules out ph all together and thats a good thing to know too.