Please help with Canna Coco

[TheTreeBoundRat]

I think your plants will come good on their own. My experience has been that untill a young plants roots can fully fill out the pot and the plant can draw enough moisture it can struggle for a while. Im not sure why this is but maybe its areas of compacted and sodden, oxygenless coco particularly in the bottom of the pot. Pot size in relation to the plant i find crucial. Especially when the plants are young. Ph of around 5.8 is the recommended norm for coco. They should start to come good over the next two weeks on their own.