Ethos & Exotic Genetics Grow

That’s the nutrients i used to water at the moment. It’s all potassium, I like the product a lot, the first pictures are of my Nuggz R1. It’s doing the best out of the plants. The middle two are of my Mookie b1. I believe the leaves to be showing signs of a potassium deficiency hence the gusher feeding. The last pictures are of my Dripping aint easy. Any tips or pointers as to why it’s so short and not growing as much? It’s only about 3 inches tall.