Why are my rhododendron leaves turning brown?
Essex, United Kingdom
I planted two rhododendrons in May in a raised bed, next to each other. Both have doubled in size in the space of a few months and had been growing very well.
The site gets sun from about 2pm onwards in high summer, otherwise is shaded. On the watering front I rely on rain but in a few drier spells I have used tap water with some vinegar added to it (I read this was a good thing to do???). Occasionally I use Miracle-Gro soluble plant food for ericaceous plants, say once a fortnight.
Now on one of the plants the leaves are starting to not look good. See the picture and the leaves are browning on the edges. Note: the other rhododendron, which is planted in the same soil about 1 metre away, is doing fine, so it can't be the soil acidity can it? Any suggestions as I don't want to lose this plant.
- 2 Aug, 2009