County Tyrone,
United Kingdom 
can you prune back phormiums after frost damage
On plant
Phormium tenax
17 Mar, 2010
Answers
i would suggest cutting away any frost damaged material it is unlikley to grow and will look a site.
17 Mar, 2010
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Well, sort of - wait a while and see how it looks, say till beginning of April or mid April depending on how cold it is (or not), then remove anything that's dead, damaged or dying from the plant.
17 Mar, 2010