
We have recently (about 2/3 weeks ago) moved a phormium tenax growing in our garden from a cramped bit of soil (used to be next to a pond, but had to be removed ages ago as was deep and we have a small child), into a fairly large trough my husband made, in order to make a feature of it.
However, it looks rather poorly now - I'd approximate that almost 50% of the leaves have now turned very yellow...

It has more room in the trough than it had before, but somebody we know said that firstly we may have over-watered it when re-planting (surely it would have dried out a little now though, since we stopped??) and that also, as it's the flowering season, it may be going through some changes and not have liked being up-rooted? It hasn't flowered since we've lived here (2 years now), but even so, may have been 'going through the motions' so to speak - apparently?
Can anyone suggest anything we could do to make it happier? Or should we just wait and cross our fingers?
Looking fwd to some help!
C.