I am on my 6th apotforpot kit, first 5 have been 2 gallon pots, 4th one in a 5 gallon. The first 4 plants all faded down the stretch as if they were underfed. I added 1/4 strength nutes after week 4 on plant #3, and ended up burning it. I stopped with the nutrients on #4, and it too faded down the stretch.
After much research (reading and visual diagnosis), I have come to the conclusion that my plants have suffered from Ca and/or Mg deficiencies. I use bottled water with 0 PPM. With plant #5 (about 3 weeks old now), I have begun supplementing with 2 ml/gal of calimagic from GH to make up for the minerals missing from my water. With plant #6, I washed and buffered the coco coir beforehand. The plant hasn’t yet been transplanted from the Jiffy peat pod, but I’m hoping that this will help.
Has anyone else had Ca-Mg issues with apotforpot plants? Buffered the coco before planting? Everything I’ve read abouit coco coir suggests that buffering the coco and supplementing with Ca-Mg is needed.
Incidentally, the camera on my phone isn;t working so I can’t upload pics at the moment. But all the classic signs of Ca-Mg deficiency are there - yellowing, brown spots, purple stems, etc.
Appreciate any feedback.