The ratio between the big three is often referred to as N-P-K (Nitrogen-Phosphorus-Potassium), where the number of each is the percentage used in the product. The remaining amount consists of micronutrients and other fillers. All-purpose, balanced fertilizer blends like 10-10-10 are easy to find and do a good job of keeping most plants happy. The best NPK ratio for growing cannabis is 2 3 and can be mucked around with such as 2 4. For the most part both of those will get you from seedling to harvest. Depending on your environment you may need some calmag, don't worry too much about the PPM numbers if you plan on using MC only, which is my suggestion. Studies have found that the ideal NPK fertilizer ratio of those nutrients for flowering plants is 3-1-2. (That's 3% Nitrogen, 1% phosphorus & 2% potassium.) So look for that ratio on the label of packaged fertilizers; anything close to a 3-1-2, a 6-2-4 or a 9-3-6 should be ideal. (Beware higher numbers—that's the realm of chemical salts.) Otherwise, it is well balanced for overall root health and plant vigor.(Gro Power Planting Tablets) 3-12-6 – This composition is high in phosphorus and will benefit fruiting and flowering of the tree. This would be a good fertilizer to use for flowering plants to help promote vibrant flowers and blooms. (Dyna Gro Bloom) For example, pepper plants much prefer nitrogen rich soil, so a fertilizer with a high concentration of nitrogen would be your best choice. For example, if you are looking to increase your yield, a phosphorous heavy fertilizer will help ensure you stimulate flower and fruit development of your plants. NPK stands for nitrogen, phosphorus, and potassium – the three essential macronutrients plants need to thrive. These are the three most important minerals for most plants, and they form the base of any balanced fertilizer. Nitrogen is important for healthy foliage growth and green coloration; phosphorus helps with root development and flower .

which npk is best for plants