Hmm...well, this plant started life in coir mix, and was up-potted to pro-mix BX, where it's been for 7 weeks. I've watered lightly every 4-5 days or so, and fertilized with half-strength Neptune's fish/seaweed fertilizer around once a week. I might have used full strength fish fert for a few weeks in the middle there, before I decided to cut it back to 1/2 strength. It seems to be a cultivar-specific challenge - all of my chinenses look good, and many of my non-chinenses look pretty good too. This problem is on 4 of my 5 Mariachis, but also on ALL of my J. Nardellos (very sad....near death, those) and most of my Marconis. Around 15 plants in total out of 70 look sick like this - leaves curling up vertically, yellow, poor foliage development, etc. What do you think? I am about to transplant outside and have to get my head around what's wrong here so I can try to salvage these plants with some kind of corrective action. Thanks...