How do you divide flag iris?

How do you divide flag iris?


  1. Cut away each fan of leaves from the clump, using a sharp knife.
  2. Select the largest fans with the healthiest rhizomes.
  3. Discard smaller fans and old, withered looking rhizomes.
  4. Shorten the leaves to about 15cm (6in) above the rhizome and trim the roots to shorten them.

What is the best time to divide irises?

Divide at the right time of year, after flowering, when irises become dormant during late summer, reducing the chance of bacterial soft rot. Avoid dividing during winter when irises are trying to survive on stored energy in their rhizomes. Snip the leaf blades to about one third of their height.

When can I move flag irises?

You can usually tell that your irises are ready to be divided when a clump looks overgrown, with rhizomes starting to grow into each other and popping up from the soil. They also may not produce as many blooms. Every three to five years is a good rule of thumb for dividing irises.

Is it too late to transplant irises?

October is a little late for transplanting iris but if the weather remains seasonably warm, you should be OK. Ideally, you should transplant them after blooming, from summer into fall.

Can you dig up irises and replant them?

Siberian iris form clumps as they grow. Over time the center of the clump usually dies out, leaving a ring of growth on the outer edges. To transplant these iris, dig up the living portions of the clump and tuck them into fresh planting beds or the same planting area.

What happens if you don’t divide irises?

It seems like too much work and, if you don’t do it, the beds become so thick and overgrown that the plants stop blooming. There is an alternative to dividing every three to four years: thinning. All you need is a sharp, heavy-bladed knife or similar tool.

What is the best time of year to transplant irises?

Late July through mid August is the best time to plant, move or divide iris. Iris is one of the most popular perennials in the garden and easy to grow. Although they provide pleasure for many years with little care, periodic dividing is an important cultural practice for maintaining plant health.

What time of year can you replant irises?

The best time when to transplant iris is in the summer, after the iris have finished blooming, up until fall.

How do I get my irises to stand up?

Van Buren said that 50 percent of the rhizome should be exposed and 50 percent should be under the soil. He suggested staking the iris with small bamboo stakes for now and adding more soil. That should help the plant to establish itself.

Are purple irises invasive?

Gardeners often use this iris as an ornamental pond plant, and value the yellow flowers that bloom in the summer. However, it can quickly become invasive, and gardeners must beware of this in order to provide the most appropriate flag iris care.

How do you divide irises in the fall?

Steps for Dividing Iris Plants To divide your iris, start by lifting the clump of iris plants out of the ground with a spade or fork. If possible, lift the whole mass out whole, but if you are unable to do this, carefully break the clump into smaller parts and lift these out. Next, brush of as much dirt as possible from the iris rhizomes.

How do you plant a flag iris?

The best place to plant blue flag or yellow flag iris is in a wet location that gets full to part sun. The plant can also be submerged in water for a time and still survive. Space plants 18 to 24 inches (45.7 to 61 cm.) apart. Flag irises do best in highly organic soil. Amend your garden area with compost or peat for best results.

Is dividing irises good for the plants?

Dividing irises is good for the plants and will result in irises to give away to friends or increase the display in your garden. The tall, beautiful iris, named after the Greek goddess of the rainbow, is one of the oldest garden flowers.

What is a flag iris?

What is a Flag Iris? 1 Blue Flag Iris – Blue flag iris ( Iris versicolor) is a beautiful semi-aquatic plant. Deep green foliage and striking blue-violet flowers appear on 2 2 Yellow Flag Iris – Yellow flag iris (Iris pseudacorus) is a perennial plant that is native to Europe, North Africa, Great Britain and the