Cut back kniphofia foliage?
Hi All, I have several lovely specimens of toffee nosed kniphofia (red hot poker only cream coloured). Some of the foliage is brown and manky looking others while the rest is quite green and healthy looking. Does anyone know - do I cut all foliage back and how far or just painstakingly cut out the dead foliage only? I've found one piece of advice on another forum saying to cut it all back to 3 inches but am worried in case that's the wrong thing to do and I end up ruining my plants! Thanks, GreenDahlia