Dropping Red Robin Tree

Question

I planted this red robin tree two weeks ago and the leaves are all drooping, I used multi compost with John Innis and some fertiliser

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Answer 1

Part of it is the transplant shock, but it also may have gotten hit with too much fertilizer. Since you planted with compost that should have been sufficient for a while. I would have held out fertilizer till next spring. You didn't say how much fertilizer you added but it may not hurt to add in a little topsoil or unfertilized potting soil to dilute its effect.

https://www.gardeningknowhow.com/ornamental/shrubs/photinia/growing-red-tip-photinia.htm
https://www.gardeningknowhow.com/ornamental/shrubs/photinia/red-tip-photinia-fertilizer.htm