Rust on a young olive tree
A year ago we purchased an olive sapling and it has started to develope rust spots, should we be concerned and if so what action, if any should we take. It is in a pot against a west, slightly north, facing wall. It is 3 feet (90 cm) tall and seems healthy in every other respect. It seems I am only permitted to attach one photo so I am attaching one that indicates the problem, should you require one that shows the plant in situ please let me know.
the marks do not appear on the underside of the leaves and appear as indentations on the upper surface. I have checked for insects that might be causing damage and cannot find any. The plant is outside ie not in a greenhouse or conservatory. I am pretty sure it is not being overwatered and it is in a pot that is drained.
- 28 Jun, 2009