How-To

9 Reasons for Iris Leaves Turning Yellow

In most cases, yellowing leaves are a sign of stress in your iris rhizomes. To keep your iris leaves from turning yellow, keep them well-watered, provide plenty of sunlight and fertilizer and rotate their position regularly. Yellowing leaves tend to appear on the outer edges of the plant with smaller inner leaves being green. The yellowing leaves are a signal that the rhizome is under stress and not getting enough nutrients or light. If you recently planted your iris and the leaves are turning yellow, it is likely due to transplant shock or too much moisture or not enough sunlight. Many iris leaves turn yellow in the fall, and some iris plants are seasonal leaf-makers. Also, some iris plants will only produce leaves in certain seasons. Here are some possible causes and solutions for iris leaves turning yellow.

  1. Underwatering

    If your iris is underwatered, the leaves will turn yellow. Watering the plant too much will cause the roots to rot and kill the plant. Roots can rot from overwatering in many ways, but one of them is overwatering, which causes the rhizome to rot. The rhizome is the underground stem of the plant. When the plant is under stress, it uses up too much of its reserves and its roots start to rot.

    Solution

    If you are watering your iris too much then start watering once a week and increase the frequency as the plant becomes more hydrated. You can also use a soil moisture meter to monitor the soil moisture in your plant’s pot. If your soil is consistently dry, then you should water your iris more often. Many people use a rain gauge to determine how much water the plant is getting. If you are watering your iris too much, then you should reduce the frequency of watering until the plant’s roots stop rotting.

  2. Overwatering

    Overwatering causes the rhizome to rot. If your iris is overwatered, the leaves will turn yellow and then brown. This usually happens when people are watering their plants too much within a few days or weeks. Overwatering can cause sunburn of the roots, which will eventually kill the plant and make the leaves brown and fall off.

    Solution

    If you are overwatering your plants, start watering once a week, and increase the frequency as your plant becomes more hydrated. You can also use an irrigation system to reduce overwatering. If you have a rain gauge to measure how much water your iris is getting, then you should reduce the frequency of watering until it stops drowning in water.

  3. Lighting Issues

    If your iris is exposed to too much light, it will become leggy and yellow. This usually happens in the fall after the leaves have turned yellow and are about to fall off. If you have too much light exposure, then you can cut back the amount of light that your iris is getting by reducing the number of hours of sunlight it receives daily or by moving a window shade closer to your plant. According to recent research, iris plants are sensitive to light and can be affected by the intensity of light.

    Solution

    This lighting issue is common in those who are growing iris indoors. If you are getting too much light, then reduce the amount of light that your iris is getting by reducing the number of hours of sunlight it receives daily or by moving a window shade closer to your plant. Also, you can use a grow light to keep your iris plant from getting too much light.

  4. Lack of Fertilization

    A lack of fertilizer will cause the leaves to turn yellow and eventually die. To prevent this, you should fertilize your iris more often. A lack of fertilizer can also cause other problems like the rhizome rotting.

    Solution

    In most cases, this is a common problem that most iris growers encounter. If your iris is not getting enough fertilizer, then you can give it a dose of fertilizer once in a while to help it grow better. Some of the fertilizers used are liquid fertilizers or slow-release fertilizers. The liquid fertilizers can be used in water and the slow-release fertilizers can be used in soil. Many people prefer slow-release fertilizers because they are safer.

  5. Pests and Diseases

    Insects are the most common pests that affect the growth of the iris. If your iris is infested with insects, then the insects will eat the leaves and the rhizome will rot. These insects include aphids, mealy bugs, scale insects, spider mites and whiteflies.

    Solution

    The most common pest that causes damage to iris plants is aphids. Aphids are small oval-shaped insects that suck plant juices by piercing their mouthparts into the leaf of your iris plant. The best way to get rid of them is to use insecticidal soap or insecticidal oil on your plants. You can also try using insecticidal soap on all of your plants around it or spraying it on the leaves and stems of your iris plant. If you have a sprayer, then you can spray it directly onto the leaves and stems of your iris plant. It is also very important that you do not water your iris after you have sprayed it with insecticidal soap or insecticidal oil because this may wash off some of the active ingredients in these products.

    There are other pests such as mealy bugs, scale insects and whiteflies that like to infest a lot of people’s home gardens including mine so I am going to list them here as well: Mealybugs are small oval-shaped bugs that suck plant juices by piercing their mouthparts into their victim’s leaf (they suck sap from the leaf). They usually appear as small brown spots on leaves but they can be seen easily when they crawl across leaves from top to bottom.

  6. Incorrect Soil pH

    This is a very common problem that most people encounter when they grow iris. Most of the iris plant fertilizers sold in the market today are made of a mixture of nutrients. The problem with these products is that they contain high levels of nitrogen and phosphorus and low levels of potassium. When you use these products, then the pH of your soil will be raised to around 7-8 pH. This is not good for an iris plant because it will cause the roots to become weak and it may also cause some diseases to occur in your plants as well.

    Solution

    The solution to this problem is to raise the pH of your soil by adding lime to your soil. You can purchase lime at any garden center or you can make it at home using limestone and baking soda.

  7. Root Rot

    This is another common problem that most people encounter when they grow iris. Root rot occurs when there is too much moisture in the soil, this can be due to overwatering or overwatering. The roots of your iris plant will soak up all of the water in the soil and then this water will evaporate out of the soil and into your plant’s leaves. This is why it is important that you keep your soil moist but not wet if you want to avoid this problem from occurring.

    Solution

    The solution to this problem is to add lime to your soil. You can purchase lime at any garden center or you can make it at home using limestone and baking soda. According to a recent study by the University of Florida, it has been found that adding 2 pounds of lime per 1000 square feet of garden soil will help to reduce the occurrence of root rot.

  8. Low Humidity

    Iris likes to have moist soil, but not wet. If the soil is wet, then the roots will rot and the leaves will turn yellow. If the soil is not moist enough, then the roots will grow too long and they will become weak.

    Solution

    Low humidity can be prevented by watering your iris plant in the morning and then again in the evening. You can create a homemade humidifier by filling a spray bottle with water, then adding 1-2 drops of dish soap.

  9. Bacterial and Fungal Diseases

    These are the two main types of diseases that you can encounter when growing iris. The first one is bacterial, which is caused by an overgrowth of bacteria in your soil. The second one is fungal, this is caused by an overgrowth of fungus in your soil. The easiest way to prevent these diseases from occurring is to make sure that you clean your plants properly before you start to grow them. You should also avoid using any chemicals on your iris plants if possible because some chemicals can be harmful to the plant’s health.

    Solution

    The solution for bacterial and fungal diseases is to make sure that you keep your soil moist but not wet if you want to avoid this problem from occurring. You can also use a homemade fungicide spray on your plants which will help prevent these problems from occurring as well.

When Do Irises Bloom?

Iris will bloom in the spring and summer months. If you live in a northern climate, then it is not recommended that you start your iris seeds indoors because the soil temperature during the winter months is too cool. You can start your iris indoors, but you must keep them at 80 degrees Fahrenheit or higher. You can also give your iris plants a head start by starting them indoors in January or February and then transplanting them into the garden after they have grown several inches tall.

When Should You Cut Back Irises?

Irises can be cut back once they start to flower. You can do this by removing the dead flowers from the plant and then cutting back the roots about two inches. This will encourage your iris to produce more blooms during the summer months. According to recent research, iris plants that have been cut back will produce more blooms over the next two years than plants that were not cut back.

Do iris grow best in sun or shade?

Iris plants like to grow in full sun, but you can grow them in partial shade as well. If you live in a region that has a harsh winter, then it is best to place your iris plant in the shade during the winter months. Iris plants do not like being under trees because they do not get enough light. Many people also place their iris plants in an area that receives filtered sunlight during the winter months.

How long does it take iris to spread?

If you have a large iris plant, then it may take a few years to spread. Some plants can spread in as little as 2 years, but others will take up to 10 years before they start to spread. The best way for you to determine how long it takes for your iris plant to grow is by taking note of the size of the roots. If your roots are growing quickly and covering the soil, then this means that your iris is spreading.

Iris is a very graceful plant that can be grown in any climate, but it will thrive in warm climates. The first step to growing iris is to choose your favorite variety and then you should decide how big you want your iris plants to be. You may want to go with 1′ tall plants or you can go with 3′ tall plants if you know that they will grow fast enough for you. They are also beautiful flowers that can add beauty to your garden. They can be grown in a variety of different ways, but you must know how to care for them properly. Once you learn how to take care of iris plants, then you will be able to enjoy their beauty for many years to come.