>>1836400>>1836400Ohhh, where to start? Going from appearance alone, it's being drowned. Location would help with diagnosis, but over watering is likely the cause of that chlorosis. I'm in the desert and my lemons get watered weekly and foliar misting is pointless here. I realize it was prolly just watered, but the potting mix appears retentive, too. Might wanna loosen it up a little with perlite, pumice, coarse peat, coarse coir or some finer crushed bark. Higher porosity is the goal. Dialing the particle size of the substrate material to around 2mm is best and watch the organic stuff as it decomposes and need replacing typically every couple of years. Thinning to only one per pot is recommended.
>2.5yr old seedlings from same parent. Taken last December 