Ask a Question
Notify Me On Question Update
Email this Question
What do the numbers on the fertilizer package mean?
Rate This FAQ
N-P-K. The first number (N) is nitrogen is an important element for leaf growth, color and development. Phosphorus (P) is used by the plant for root development and seed production. Potassium (K) is used by the plant for disease resistance, hardiness and sugars. Sometimes a fourth number may follow the third, indicating presence of another element like sulphur, iron or zinc. Federal and State laws require all fertilizer labels to represent the actual percentage of nitrogen, phosphorous, and potassium by weight. Thus, ammonium sulfate (21-0-0) contains 21% nitrogen by weight and provides neither P nor K.
Submit Your Suggestion
Other Questions In This Topic
- I have a curly willow that was topped about four years ago. Now it needs to be trimmed. Can I cut the branches back to where they were cut last?
- I am buying a new house in Salt Lake County, and the entire back yard is weeds. I want to put in a garden towards the back and fill in the rest with grass. What is the best way to kill the weeds completely, without killing the new grass and affecting the garden?
- Why are the needles on my spruce tree turning brown and dropping?
- Do you have tips on managing grasshoppers in my yard?
- Why are my cherries wormy?
- I have an infestation of red ants in my retaining wall area where I also have plants. What is the best way to get rid of the red ants so I can weed etc. in that area?
- I want to make a portion of my yard a 0scape environment. How do I prepare the area so that the grass/weeds to not take over? What tools will I need to make the soil acceptable? What time of year is best to plant new plants for this area?
- We live in Riverton with heavy clay soil. Will gypsum pellets help the soil so water does not run off so much? Can gypsum be applied on top of existing grass? In soil flower beds? In vegetable gardens? Is Utelite better than gypsum? Thank you.