S
StealthGrown
Guest
You have me stumped honestly. That's the first time I've seen leaves cupped like they have. Are the ends of your leaves burnt looking and possibly curled? Is there any signs of burn on the serrated edges? Magnesium problems and Nitrogen problems are easy to confuse and unless its a serious problem some might get a Calcium and Magnesium problem twisted. I tried doing some reading for you and the best they had was saying that is was nutrient burn that causes the cupping.
The new top growth is yellowish, the tips atleast. The HBD definitely has a Mg deficiency I'm thinking because of that bottom leaf with yellow patching. Serrated edges, like pointy upwards leafs? If so, yes the AKR has that written all over her. This has got me stumped too. They look like I'm stunting them even more. : (