It's in desperate need of splitting and replanting - that's why there are no flowers. Now is the right time to do it. Some info here - https://www.rhs.org.uk/plants/iris/dividing Most important is to replant so the tubers get baked in the summer sun - that will ensure flowers next year.
Billericay - Essex
Knowledge is knowing that a tomato is a fruit. Wisdom is not putting it in a fruit salad.
Once you've dug it up, you'll be able to see what need doing. The old rhizomes will have fresh new rhizomes with leaves coming from them - they are the ones you want to keep. The old rhizomes can be thrown away. When replanting the new rhizomes they need to be on the soil surface pointing in a direction where they will get the most sun with the leaves at the back so they're not shading the rhizome. Cut back the fan of leaves to about 4-6" so they don't move too much in the wind then keep them watered for a few weeks until they grow new roots. You should get quite a few from that clump and have a great display next year.
I bought one plant a few years ago then split it a few years later so now I have lots-
Billericay - Essex
Knowledge is knowing that a tomato is a fruit. Wisdom is not putting it in a fruit salad.
I've not done that but can understand it may be a good idea in a windy spot to stop root damage from movement. I usually just remove any dead leaves and give them a general tidy-up. They get a sprinkle of blood fish and bone in early spring. I'd like to be able to mulch them as I do with my other plants, but find the mulch ends up covering the rhizomes.
Billericay - Essex
Knowledge is knowing that a tomato is a fruit. Wisdom is not putting it in a fruit salad.
Posts
Now is the right time to do it.
Some info here -
https://www.rhs.org.uk/plants/iris/dividing
Most important is to replant so the tubers get baked in the summer sun - that will ensure flowers next year.
Billericay - Essex
Knowledge is knowing that a tomato is a fruit.
Wisdom is not putting it in a fruit salad.
Using your suggestion will kill them.
It'll take less than an hour to divide and replant them.
I have several clumps and divide them every 3-4 years when they start to become congested.
Billericay - Essex
Knowledge is knowing that a tomato is a fruit.
Wisdom is not putting it in a fruit salad.
The old rhizomes will have fresh new rhizomes with leaves coming from them - they are the ones you want to keep. The old rhizomes can be thrown away.
When replanting the new rhizomes they need to be on the soil surface pointing in a direction where they will get the most sun with the leaves at the back so they're not shading the rhizome.
Cut back the fan of leaves to about 4-6" so they don't move too much in the wind then keep them watered for a few weeks until they grow new roots.
You should get quite a few from that clump and have a great display next year.
I bought one plant a few years ago then split it a few years later so now I have lots-
Billericay - Essex
Knowledge is knowing that a tomato is a fruit.
Wisdom is not putting it in a fruit salad.
I don't know about you @Pete.8 but in September, (or early autumn), I cut the leaves three quarters down on a slant.
I usually just remove any dead leaves and give them a general tidy-up.
They get a sprinkle of blood fish and bone in early spring.
I'd like to be able to mulch them as I do with my other plants, but find the mulch ends up covering the rhizomes.
Billericay - Essex
Knowledge is knowing that a tomato is a fruit.
Wisdom is not putting it in a fruit salad.