I have just watched and listened to Monty Dons advice on lemon trees. My lemon tree still has lemons on it, but needs some help. Can I, as Monty advised replace the top of the soil and feed with seaweed fertilizer, or is it best to stick to my citrus fertilizer? The leaves are a bit yellow and there are a lot of new leaves (green) on the tree.
Any advice will be good.