enter image description hereMy cactus has started to to yellow, it was left in the greenhouse over winter in its normal

  • Aye, what a pity. I think it is sunburn. Did it get suddenly very hot and sunny in the greenhouse? – benn Apr 25 at 16:27
  • Not that I was aware, I wandered if it was too cold in the greenhouse maybe? – Christopher Woodroffe Apr 26 at 22:03
  • If it is caused by cold, it is rot. – benn Apr 26 at 22:07

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