Growing medium retransplant to 3 gallon pot.
3 is showing some darker, purplish hues in center compared to the others. All 3 have different potting mix composition.
1: Straight "Promix" potting mix
2: Whitney Farms potting soil + added coco coir/perlite/vermiculite.
3: Fox farms + coco coir +vermiculite
All have various dry fertilizer added (Sustane, mineral sea salt, epsome salt, gypsum, lime)