| Just wondering if anyone can help with a problem with a baby Banksia robur I planted about a month ago. It is producing new growth OK, but the mature leaves are going brown around their edges. Quite substantially, not just the leaf margins.
Planting details: it's planted in a loam soil over clay, with a fair amount of compost (Searle's) worked in to mound it up a bit. I have been watering at least 2x per week and it's been raining, which should I thought would be good, since it's a swamp banksia. Position (west side of a fence) gets full sun from noon to ~4 pm and bright indirect light the rest of the day. After talking to a nurseryman I have worried about the compost possibly containing high phosphorus additives, but the Banksia coastal cushion and plagiocarpa planted in the same stuff and 10m away are thriving. |
