Hi
@Tylando I've been looking at the weeks in your diary. definitely it is not totally a lack of manganese, this deficiency starts with a pale dark green and the yellowish begins to appear from the center of the leaf to the tips of the leaf, only the stains seem to be an effect of the lack of manganese. seems to me more evident a deficiency of K, in week 6 and 7 you already had some tips of the leaves burned and in general all turned downwards, yellowing started from the tips of the leaves to the center, and in the advanced state of deficiency of K also burnt spots appear, but they are usually burnt spots more like the spots that appear in magnesium deficiency. but there may be a shortage of both manganese and K. good luck mate 👍