Blue Flag Iris

Blue Flag Iris is a genuinely satisfying plant to grow, but I want to be upfront about one thing: blanketweed algae competing for nutrients in established ponds. I've dealt with it twice now and it takes consistent attention to manage. Beyond that, natural filtration improving water clarity and qua…

Blue Flag Iris is a genuinely satisfying plant to grow, but I want to be upfront about one thing: overrunning the pond surface in productive warm summers. I've dealt with it twice now and it takes consistent attention to manage. Beyond that, extraordinary flower forms rising above or floating on th…

I want to be honest: I'm not getting great results with Blue Flag Iris and I'm not entirely sure why. frost damage on tender varieties left in shallow water has been a recurring problem despite my attempts to address it. I've been focusing on removing dying foliage in autumn before it rots and reduc…

Here are my notes from twelve months of growing Blue Flag Iris: Spring: foliage die-back and pond tidying in autumn. This was the moment that confirmed the whole venture. I focused on removing dying foliage in autumn before it rots and reduces water quality during this period which set up the rest …

I started with one Blue Flag Iris and now have four, all from propagation. The process is straightforward once you understand positioning at the correct water depth for the species — something I picked up from trial and error rather than any guide. I display them in a natural wildlife pond with nat…

People describe Blue Flag Iris as easy and I'd push back on that slightly. dividing overcrowded plants every two or three years in spring needs consistent attention and blanketweed algae competing for nutrients in established ponds can undermine progress quickly if ignored. Where Blue Flag Iris is …

I'd had Blue Flag Iris for about eight months with acceptable but unremarkable results. Then I started really paying attention to dividing overcrowded plants every two or three years in spring and the difference over the next two months was dramatic. cooling visual effect and microclimate benefit i…

I planted Blue Flag Iris without expecting much and it's become one of the most satisfying things in my garden. natural filtration improving water clarity and quality is something I couldn't have predicted from looking at it in a nursery. You only understand it once the plant is established and perf…

After growing Blue Flag Iris for over a year here is what I'd tell a beginner. First: dividing overcrowded plants every two or three years in spring is not optional — it's the foundation everything else depends on. Second: blanketweed algae competing for nutrients in established ponds will happen a…

My first attempt at Blue Flag Iris failed — root-eating by water lily aphids or china mark moth got hold of it and I didn't know what I was looking at until it was too late. I left it alone for a year before trying again. The second attempt, with proper attention to dividing overcrowded plants ever…