What's that strange dark colouring in these little plants? Tangerine Dream Auto is the older. Northern light automatic is the younger. Different soil (the first with 25% coco, the other only soil) , all outdoor. Maybe phosphorus deficiency? But they are growing really good for me. Tangerine dream is bigger then my glue Gelato when it was at the same age. But glue Gelato is not showing the same thing. If it is a disease or a deficiency I would like to know.
if you mean the darker color at the center of the leaves where they join to the leaf stalk its nothing to worry about at all ,,,seedling look fine mate ,,,mac,