Doing research I thought I learned that yellowing leaves means nutrient deficiencies. A couple weeks ago I had several yellow leaves & come can find out my partner was still using the veg formula into flowering. We made the adjustment & we still have yellow leaves. What do we need to do?
We feed, feed, water, feed, feed, water. Could this have something to do with the problem?
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Here's what I aim for when in flowering:
Weeks 1-4 - 750-950
Weeks 5+ - 1000-1600 Not sure if you have my book but there is a section on PPM which gives a bit more detail.
Introduced CalMag & have even more yellowing today @mr.growit
@D K How much Calmag should I use & just mix it in water?
Cannabis loves calcium and magnesium. I would pick some up and give it a try to see if things improve. If you have some plain Epsom salt on you, give that a try with your next feeding at a TBL per gallon, but definitely get a ppm and pH meter to keep an eye on your numbers. All plants have different needs.
Looks like it needs some magnesium. Do you give it calmag? I would check your soil pH and PPM also by doing a slurry test and report back your numbers.