Moderate fertilizer is required during the strong growth periods of spring and summer. A slow release fertilizer can be put into the potting soil and this should be a balanced one, supplement with liquid water soluble fertilizer every 7 – 10 days. If the foliage shows signs of tip burn or black spots on the top and under side it means a lack of food.
Keep in mind there is no guarantee that this information will always work, climatic conditions will have an effect in any environment. Again, this information and the related advices of this web site are solely based on past experience and expertise and no other, and in no case shall be constructed to provide a guarantee that certain particular purpose or results will be achieved.