Garden flowers

Iris: superb perennial flower


The iris is both beautiful and elegant but also easy to grow for a flowering of all beauty.

What you need to know about the iris:

Last name : Iris
Family : Iridaceae
Type : Bulbous or perennial flower

Height : 20 to 90 cm
Exposure : Sunny and partial shade
Ground : Ordinary

Flowering : January to July depending on the species

Here is the maintenance and the little things that will keep your iris blooming beautifully from year to year.

Planting irises

Ideally, the iris planting takes place at spring or summer, usually from May to November for flowering the following summer.

  • Plant the iris rhizomes in well-loosened soil without burying them too much.
  • Observe a sufficient spacing of 5 to 10 cm between each iris plant.
  • Let the iris rhizomes protrude very slightly so that they receive the sun on their upper part.
  • This will prevent them from rotting in particular if they are too buried.
  • For a beautiful decorative effect, count about fifteen feet per m2.

The iris mainly fears the lack of sun which prevents it from flowering properly but also the waterlogged land.

Sowing irises:

In sowing, prefer sowing your irises in pots in September October.

  • You can leave them outside and under cover all winter.
  • Flowering will only take place 2 to 3 years after sowing.
  • You will proceed to transplanting in the ground as soon as the first leaves emerge.

Multiplication of irises

iris is a plant which multiplies very easily by dividing rhizomes.

The technique of multiplication of irises is indeed thedivision of rhizomes after flowering every 3 to 4 years.

  • The division takes place in the summer or in the fall.
  • Carefully dig up some of the rhizomes by lifting them out of the ground.
  • Using a knife, separate the rhizomes and keep large fragments of at least 10 cm.
  • Replant these rhizome shards elsewhere in the garden.
  • When planting, cover with good soil and apply a slow-release fertilizer, including on old rhizomes that have remained in the ground.

This operation allows the plant to give it new youth and create new ones at a lower cost!

Iris maintenance

The maintenance of irises can be reduced to a minimum because it is a flower that demands very little care.

In addition to the division of the rhizomes mentioned above, here are the actions that will allow you to prolong flowering or quite simply to have beautiful irises.

  • Remove wilted flowers as you go, but leave the foliage until it has completely yellowed, usually until September.
    The iris needs to see its leaves turn yellow in order to build up the reserves it needs for the next flowering.
  • Remove the weeds that grow in the center of the plant to clear the rhizomes.
  • No need to water because the plant does not need it.

Watering and fertilizer in iris:

Iris is particularly resistant to drought and should only be watered in very hot weather and / or prolonged drought.

Iris in pots, on the other hand, requires more regular watering, generally when the substrate is thoroughly dry.

  • Add a slow release granular flower plant fertilizer in the spring.

Diseases and parasites in iris:

The iris is little prone to disease but she can be the prey of snails and slugs.

To know about Irises

Iris is a fairly rustic plant that tolerates winter very well. The cold even participates in the good development of the plant.

Its flowers are characterized by 3 magnificent petals in the most varied colors.

Most of the time purple in color, they can also be blue, yellow, red or white.

The lifespan of an iris can range from 5 to 20 years and its resistance to frost and cold can go down to -15 °.

There are over 200 different species of irises and just as many different colors and shapes.

Note that some iris species are used in perfumery from which the essence of the rhizome is extracted.

Meeting with an Iris breeder

Here is some advice from Jean-Claude Jacob, breeder and producer of Iris. He introduces us to the Groundblade Iris.

Smart tip

To optimize its lifespan, add a special bulbous organic fertilizer every year after flowering.

Video: How to Plant Dwarf Iris Reticulata: Spring Garden Guide (October 2020).