Can you please tell me what might be causing my araila to be discoloring as seen in picture. Leaves drop off when you touch the discolored ones. It is shaded from sun up to 1 pm then in full sun. It is sheltered from east and north wind but does get south westerly breeze. I only have it 2 years and is a young plant 4ft high with one stem. Any advice greatly appreciated as its a rare plant and was expensive even for such a small plant.
The other possibility is drought hat occurred earlier and competition from other plants.
Trya mulch of well-rotted compost. The other leaves look fine.