Repotting pond iris
There was some conflicting advice on GW this week. I was pleased to see Monty talking about potting up pond plants and saying that you should never use garden compost as it puts too many nutrients into the water. The next item was with a couple who have the national collection of water irises who said that irises don't like specialised pond compost and should be potted in normal garden compost. So which is right? I have a big clump of variegated iris which I was about to split and replant in pond compost. Not sure what to do now.
What do other people use?