Observation Scientfic Mthod Plants Fertilizer. For example, we know that plants require nitrogen. Add a teaspoon of each fertilizer to a different cup and stir well.
Fill each cup about 2/3 full with potting soil. Web most fertilisers supply nitrogen, phosphorus and potassium. A horticulturist (plant scientist) complains to the city that a nearby residence is ruining his flowers because of the detergent being used to wash their.