Full name: Caryopteris clandonensis Dark Knight Blue Mist Spirea
The plant was very healthy when I bought it. I planted only two weeks ago, in an area with sun from the morning to about 2 pm. The soil is quite alkaline, a soil test shows pH is in the range of 8.0 (please see attached picture). Water it regularly, once a day.
This morning I noticed there are brown spots on the leaves (please see attached picture). Please advice what the problem is, and how I may protect my plant.