Iris laevigata — a medium houseplant, prefers full sun light
SPECIMEN · FROM THE LIBRARY
Iris laevigata

Iris Laevigata

Updated · 29 observations
ON THIS PLANT

Iris laevigata, known as Japanese iris, rabbit-ear iris, or shallow-flowered iris (Japanese: kakitsubata カキツバタ), is a species of flowering plant in the family Iridaceae, native to Japan. It is related to other members of Iris subgenus Limniris, including other species of Japanese irises. It is found growing in shallow waters and seems to prefer marshy and still ponds, although it can also be grown in damp soil if conditions are right. Flowers are usually blue, purple or violet and have unique colour patterns including some types with predominantly white flowers with blue spots (washino-o), and dark purples bordered with white (maikujaku). Synonyms include I. albopurpurea and I. phragmitetorum.

A note from PlantMom

Rabbitear iris has strong resistance to disease and is generally not likely to suffer from illnesses. However, it can be affected by pests and diseases present in its environment. These infections are usually mild. Regarding care, this plant needs a moderate level of maintenance. It should be pruned regularly to keep a neat appearance and encourage healthy growth. Fertilizing can also boost flowering. Rabbitear iris is suitable for anyone with outdoor space, such as a garden or patio, and does not demand extensive care experience. It may need more attention if cultivated indoors.

— PlantMom
CARE GUIDE

How to keep Iris Laevigata.

Light

Rabbitear iris does best in full sun and can still do reasonably well when sunlight is somewhat reduced. Its native habitat, where it flourishes, is characterized by abundant sunlight. However, both excessive sun and insufficient sun can hinder its healthy growth.

Water

The rabbitear iris naturally grows along the edges of wetlands and thrives in moist environments. It can tolerate occasional flooding and short periods of dryness, but it typically needs to be watered once a week. This plant does well in outdoor garden ponds or boggy areas, and it manages its water intake through its rhizomatous roots.

Temperature

Rabbitear iris grows best in temperatures from 41 to 95 °F (5 to 35 °C), reflecting their native growing environments. To ensure optimal growth, keep temperatures steady and adjust them for seasonal changes if needed.

Fertilizer

The best time to fertilize a Rabbitear iris is in early spring, as it comes out of dormancy and begins active growth. Fertilizer supplies essential nutrients for healthy development. Although Rabbitear iris has fairly low fertilizer requirements, applying fertilizer once a year can improve its survival and encourage better, longer-lasting blooms.

Pruning

The Rabbitear iris showcases beautiful blue flowers and delicate, slender foliage. To encourage new growth, it's best to prune these plants from early to late spring by removing any faded blooms and damaged leaves. Regular maintenance not only improves air circulation, thereby minimizing the risk of fungal issues, but also helps keep the plants looking neat. Pruning is essential to ensure healthy and abundant blooms in the following season.

CHARACTERISTICS

Botanical profile.

Plant Type
Herb
Life Cycle
Perennial
Genus
Iris
Family
Iridaceae
Hardiness Zone
5-9
Mature Height
76 cm
Mature Spread
49 cm
Leaf Color
Green
Leaf Type
Deciduous
Flower Color
Blue, Purple, Lavender
Flower Size
7.62 cm to 15.24 cm
Bloom Time
Late spring, Early summer
Planting Time
Summer
Harvest Time
Mid summer, Late summer
Native Area
Russia, Japan, Koppen, South Korea, China
ALSO KNOWN AS

Other names.

en Japanese iris en Shallow-flower en Rabbitear iris en Rabbit’s-ear iris en Rabbit-ear iris
FREQUENTLY ASKED

Reader questions.

How should I water my Rabbitear iris?

To properly water the Rabbitear iris, it's best to use filtered water at room temperature. Tap water may contain harmful particles, so filtering it ensures the plant's health. Since the Rabbitear iris is used to warm climates, it's important to avoid using cold water, which can stress it. Additionally, overhead watering should be avoided as it can cause issues with the foliage. Instead, simply pour the filtered room temperature water onto the soil until it is completely saturated. This helps moisten the roots and enables them to spread throughout the soil and gather the necessary nutrients.

Why is it necessary to add fertilizer to my Rabbitear iris?

Fertilization is important to the Rabbitear iris because it provides essential nutrients for the plant's growth. While the overall fertilization needs of the Rabbitear iris are relatively low, annual fertilization can greatly benefit the plant. It can help keep the plant alive and promote the development of better and longer-lasting flowers. Therefore, those who want their Rabbitear iris to look its best should make sure to fertilize it annually.

What kind of sunlight does the Rabbitear iris need?

Rabbitear iris is a plant that requires full sun daily. This means it needs at least six hours of sunlight to keep its leaves, roots, and blooms healthy. While most perennials also need six hours of sun each day, certain plants like the Orange Daylily or Giant Coreopsis can survive on just three hours of sunlight. However, it's important to note that although these perennial flowering plants can survive on less sun, they won't thrive as well as they would in sunnier conditions.

What temperature is best for Rabbitear iris?

The ideal temperature for Rabbitear iris depends on the time of year. There are two main seasons to consider: the growing season and the dormancy season. During the growing season, when the iris has started to sprout, the best temperature range is 65-80℉(18-27℃). If the temperature drops below 15℉(-10℃), the plant will suffer and its leaves may turn brown and wilt. However, if it's a short cold snap, the iris may survive with some assistance. In the warmer parts of the year, the iris should be protected from excessively high temperatures. The upper temperature limit is 95-105℉(35-40℃). Anything above that will harm the foliage and blooms of the iris. High temperatures can cause wilting, drooping, and even sunburn on the leaves, which can be difficult for the iris to recover from. Fortunately, there are several simple ways to address this problem.

What do I do if I give my Rabbitear iris plant too much or too little water?

Overwatering is a bigger problem than underwatering for the health of your Rabbitear iris. When the plant gets too much water, its stems and leaves wilt and turn yellow. Over time, this can lead to diseases like root rot, mold, and mildew, which can be fatal. Underwatering is not as common, as the plant can handle drought well, but it can still happen. When underwatering occurs, the leaves become brittle and brown. It's important to catch signs of overwatering early, as some diseases may be irreversible if left untreated. Reduce watering if you notice early signs of overwatering and check the soil for poor drainage. If the soil doesn't drain well, replace it with a loose, well-draining potting mix. If you see signs of underwatering, simply water more regularly until the signs improve.

When should I fertilize my Rabbitear iris plant?

The best time to fertilize a Rabbitear iris is in late winter or early spring when it is transitioning from dormancy to active growth. Fertilizing at this time promotes healthy growth. While early spring is generally the best time, fall is also acceptable for fertilization. However, it is not recommended to fertilize the iris in summer or winter.

Can the sun harm the Rabbitear iris? How can you keep the Rabbitear iris safe from the sun and heat?

In warm climates, some Perennial Flowering Plants may struggle with excessive heat and suffer from sun damage. They can wilt, dry out, or even experience growth problems if they are consistently exposed to the intense afternoon sun. However, not all plants require protection from the light afternoon sun. For those that are harmed by intense afternoon exposure, it is recommended to provide them with some shade in warmer climates. Gardeners can achieve this by planting these plants in areas that do not receive direct heat during the afternoon, such as under trees or behind bushes.

What temperature does a Rabbitear iris seedling need in its first year?

If you have a Rabbitear iris plant in its first year outside, it needs extra care during the cold months. Frost can cause severe damage and prevent it from growing back in the spring. To protect it, keep the temperature above 40℉(5℃) either by bringing it indoors or using mulch or fabric barriers. During the first year or two, it's best to plant the Rabbitear iris in a shadier spot as smaller plants struggle to regulate their temperature in the heat. Only give it up to five hours of direct sunlight per day, especially if it exceeds 80℉(27℃). To control summer heat, use shadecloth and provide frequent watering or misting.

How frequently should I give water to my Rabbitear iris?

If your Rabbitear iris is in a pot, the best way to check if it needs water is to stick your finger in the soil. If the top two to three inches of soil are dry, it's time to water it. If your Rabbitear iris is planted outdoors, you can use the same method to test the soil. When the top few inches of soil have dried out, it's time to water. Typically, during spring and early fall, you'll need to water this plant about once a week. In extremely hot weather, you may need to water it twice or more per week. However, mature and well-established Rabbitear iris plants can handle drought well.

When is it not a good idea for me to fertilize my Rabbitear iris?

To properly care for your Rabbitear iris, it is best to fertilize it only in late winter and early spring. This plant doesn't require frequent feeding, so a single annual application will suffice. Overfertilizing during spring, summer, and fall can cause unwanted complications, so it's important to avoid it. The exception to this rule is if you missed fertilizing in spring, in which case it is acceptable to feed the plant in fall. Additionally, it is not necessary to fertilize the Rabbitear iris during the winter as it goes into a dormant growth phase, meaning it doesn't produce new growth. Therefore, it is not advisable to fertilize during most of the winter.

Do I need to cover Rabbitear iris to keep it safe from the sun?

Certain perennial plants require ample sunlight to reach their maximum bloom. However, in warmer climates, some of these plants actually benefit from less sun. For instance, individuals residing in hotter regions might find it beneficial to shade their flowering perennials during the intense afternoon sun, especially during summer months. Although many perennial flowering plants prefer partial shade in the hottest climates, there are exceptions. Take the Giant Coreopsis, for example, as it is not bothered by excessive sun exposure. These plants can flourish even when placed in the full sun during scorching weather.

How can I keep the Rabbitear iris safe from really hot or really cold weather?

During the growing season, if the temperature drops below 15℉ (-10℃), there are steps you can take to protect Rabbitear iris from frost or cold damage. If you have Rabbitear iris in a container, simply bring it inside with indirect light until the temperature rises again. For ground-planted Rabbitear iris, you can use mulch or horticultural fabric to create a protective barrier against frost and cold wind. On the other hand, if the temperature rises above 80℉ (27℃) in the shade during the day, be cautious about exposing Rabbitear iris to more than six hours of sunlight, preferably in the morning. Setting up shade cloth or a fine plastic mesh can help reduce direct sunlight during the hottest parts of the day. Additionally, installing a misting system that releases cooling mist around the base of the plant can lower ground temperatures.

PLATES
Iris laevigata leaf
PLATE 01 · leaf
Iris laevigata leaf
PLATE 02 · leaf
Iris laevigata flower
PLATE 03 · flower
Iris laevigata flower
PLATE 04 · flower
Iris laevigata habit
PLATE 05 · habit
Iris laevigata habit
PLATE 06 · habit
ALSO IN THE LIBRARY

You might also like.