|I would like information on the following topics concerning Gardenia
plant: What diseases will this plant get? What type of planting soil(s) do I need to grow them? What are the watering problems? What causes leaves yellowing,turning brown and black, which in turn causes the stem to wither and die?
Are there any Gardenia Society ?--addresses and phone numbers.
Plant gardenias in a soil with lots of peat moss or composted bark mixed in about 6 inches deep. Fertilize them with a product for acid loving plants, such as Miracid, following label directions. Water with rainwater if you have it available to minimize the high pH water that is common in your area. Proper fertilizing and pH is important to minimizing or eliminating the yellowing leaves caused by iron deficiency. Brown or black stems and leaves is usually a sign of root death. Soggy soil conditions or dry soil can both cause root death.
Here is contact info for the Gardenia Society of America:
Box 879, Atwater, Calif. 95301
Thanks for the question. Please stop in again soon!