Answer:
Needs at different time and rates.
Step-by-step explanation:
There are different fertilizers for turf, vegetables, and houseplants because different plants have different needs of fertilizer requirement and different amount of fertilizer is applied to different stages of plants. All these crops needs Nitrogen, phosphorus and potassium in large amount for better growth and productivity. These nutrients such as Nitrogen, phosphorus and potassium needed by the plant at different amounts due to the crop physiology.