Help please. I am a reasonably good gardener but my bay trees are bothering me. They are turning yellow and leaves falling.
I have had them about 5-6 years, they are 4 feet high and about 2 feet wide- standards either side of a door on a sheltered south facing patio. They have grown well and were healthy but over the past month or so a lot of leaves went yellow.
I thought it might be drought so watered them more, then I've fed them with a liquid plant food- nothing special. Do they need repotting maybe or some blood, fish, bone meal type of feed? There are no bugs on them and the leaves are healthy apart from losing colour.
They are worth about £100 each so really want to save them.