Why Has My Phormium Lost Its Colour?

Question

My phormium has lived happily in a ceramic container for years but over time has lost its lovely pinky-orangey leaves and is now mostly greenish. Should I be feeding it? I thought the initial instructions said not necessary but may have remembered wrongly. I have very acid soil, and think I would have planted it in something like John Innes No. 3 and have topped up occasionally with a good compost. Something I am doing is obviously wrong. Sorry, no photo as my digital skills not up to uploading from camera to this page.

Answer 1

It is not unusual for the plant to revert back to its parentage foliage. If this happens, cut the affected leaves back to the base of the plant.

https://www.gardeningknowhow.com/ornamental/foliage/new-zealand-flax/new-zealand-flax-plant-care.htm

http://sonomamg.ucanr.edu/Plant_of_the_Month/Phormium/