OK not too bad. Not familiar with the BN PK+ but if it's like other nutrient formulas, it might just be a booster to use for a couple weeks depending on the manufacturer's recommendations. Bloom nutes should have a little N in them, but more of the P and K. Have you checked the BN website for their feeding schedule?

As for the pots those look way bigger than 1.5L, more like 10L, and for plants that size they should be alright. :jointsmile: