I'm very confused when it comes to understanding the NPK on fertilizers. I know that the numbers are for Nitrogen(Foliage)-Phosphorus (root and flowers) and Potasium (plant health).
Right now I have three different fertilizers at home. The regular Miracle Grow 12 - 4 - 8, Orchid Fertilzers 30 - 10 - 10 and Hasta Gro Plant 6 - 12 - 6. Miracle Grow I use it every other Saturday to fertilize my Hydrangeas, Azaleas, Container Plants. The Orchid only when I fertilize my orchids. The Hasta Gro Plant I haven't use it yet. I just bought it as a recommendation from the person at the nursery for all my garden plants and flower beds. How do I really know if I'm using my fertilizers the correct way?