Plagron PK 13/14 This Plagron PK 13/14 mineral fertilizer provides plants with extra phosphorus and potassium in the flowering phase. PLAGRON PK13/14 DETAILED INFORMATION Use and dosage Before use, shake well. For every 1 litre water, add 2 ml of the PK13-14 (1:500). Add the basic nutrient to the water until you reach the desired EC. This nutrient solution should be used every time plants are irrigated during the flowering phase. These are the characteristics NPK fertiliser (0-13-14) Packaging 250 ml and 1L bottle. Do I need to regulate pH or EC values if I use PK 13-14 for my plants? When growing with PK13-14, it is important to regulate both the pH value and the EC value. The pH value is used to determine the rate at which the plant absorbs nutrients. Tap water can vary in its pH and EC depending on where it is located. A nutrient solution should have a pH between 5.5 to 6.5. This pH value can be adjusted with pH Plus or pH Min, as well as Lemon Kick. Each plant species has a different EC value. Transparency is a feature of my PK 13-14. Does that make sense? That's right. PK 13-14 is Transparent.