I planted my pyracantha just over two weeks ago and noticed recently that in all the plants, quite a few leaves are yellowing all the way up the stem. The bottommost leaves also look a bit powdery. The berries look fine though. The shop I ordered from said this was normal at this time of year as it is semi evergreen but I'm still worried. What could be the problem?
I also haven't completely untied the stems from the bamboo cane near the bottom (the green tape), should I do this?