I have a fairly young rhododendron (at least two years). We planted it in the spring. For the past 2-3 months the leaves have slowly been yellowing and turning brown in spots.
The soil is acidic, but to what degree I am not sure. I have not fertilized beyond mulch and a bit of old coffee grounds. The plant gets partial sun (mostly hot afternoon sun), and it hasn't rained for about 6 weeks although I water it every other evening.
Is this a "wait and see" type of problem, or is there something I can do to make it healthier?