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
- Does it help to aerate in the spring and fall? Also if there is a lot of dead grass and thatch build up would it be beneficial to power rake in the spring?
- How do I prune my roses?
- I moved into my house, from out of state, with a yard full of weeds (dandelions, morning glories, etc.) When would be a good time to treat them? Before or after winter hits? Any suggestions of products to use? Thanks!
- I sodded my back yard 3 years ago with RTF. It has not held up well, especially in the higher traffic areas where it is completely dead. Any suggestions?
- Do you have tips on firewise landscaping?
- we would like to plant a cherry tree in our backyard for the fruit and the shade. what would be the proper kind to purchase,we like sweet cherries.
- Do you have tips for newly planted trees?
- Spotted spurge is taking over my lawn. What can I do now, in these hot August temperatures, to knock back this weed problem?