Why Is My Box Hedge Going Brown?

Are you wondering why your box hedge is brown? If so, you are not alone. In fact, there are a number of reasons why a hedge may turn brown. However, there are also a number of things that you can do to help your hedge return to its former glory.

Root rot

If you have a box hedge, chances are that it is infected with several different diseases. These include root rot, crown and root rot, Phytophthora root rot, and Macrophoma leaf blight. Getting a proper diagnosis is important.

Symptoms of a Phytophthora root rot attack include black spore cases on the leaves. Plants with this disease often die. There are many Phytophthora species that can cause this type of root rot. A soil analysis should be performed to confirm the presence of the fungus.

Boxwood is also susceptible to a fungal pathogen called Volutella buxi. This fungus causes browning of the foliage and petioles. However, it can be treated with approved fungicides.

English boxwood decline is another disease that affects the boxwood. The disease can be caused by a number of different abiotic and biotic stressors. Stress-tolerant cultivars are less likely to be affected by this disease.

Boxwood blight

If you’re growing a boxwood or other Buxus species, you may have noticed a strange brownish haze covering the foliage of your plants. This is an indication of a disease called boxwood blight.

Boxwood blight is a fungal disease. It affects all Buxus varieties. However, it’s especially damaging to the common Boxwood species. Some other shade-loving plants are also affected.

The fungus that causes boxwood blight, Calonectria pseudonaviculata, thrives in warm, humid conditions. As such, it’s most favored by temperatures between 68-77degF.

Infected leaves develop large, dark lesions. These can appear on both sides of the leaf. They’re also accompanied by small, pink/salmon fruiting bodies.

This blight can spread rapidly. If you see signs of the fungus, it’s important to remove any infected plants. Also, be sure to dispose of any plant trimmings in a trash can.

Winter burn

When you think about box hedges, you might imagine them flourishing in the warm months of the year. But when winter approaches, their leaves can suffer from a condition known as winter burn.

Winter burn is caused by freezing temperatures. When the ground freezes, the water from the root system cannot penetrate to the foliage. Consequently, the foliage becomes dry and shrivels. In the worst cases, this can lead to defoliation and even death.

The best way to prevent winter burn is to provide adequate moisture to your boxwood. This should be accomplished by providing two inches of water a week, preferably with a soaker. If you don’t have access to a hose, you can also use a drip hose.

Another way to prevent winter burn is to protect your boxwood from harsh winds. Winds can cause brown needles to die and can also lead to additional water loss.

Diglyphus isaea

The Diglyphus isaea is a commercially available parasite that can be a good alternative to a spray solution for controlling leaf miners. It’s also a good choice for indoor growers because it has a shorter lifecycle than its host. This is a good thing, since leaf miners are a pest.

Although they aren’t entirely benign, they can be controlled with the aid of natural enemies and botanical insecticides. If you want to give them a try, you can find information about Diglyphus isaea online. You can also buy it from a retail outlet or order it online.

The best way to get rid of them is to water the boxwood every week. Watering the plant is necessary for a number of reasons, including keeping the root zone warm. Also, you’ll need to keep the soil in the boxwood healthy. In addition to regular fertilizing, you’ll need to incorporate all-purpose soil into the mix.

Volutella blight

If you have a box hedge or other shade-loving plant that is displaying brown leaves and black spots, it may be affected by Volutella blight. This fungus is a parasitic fungus that attacks the leaves of many plants.

Box blight is an aggressive disease that will destroy all the shoots and leaves of a healthy plant. It is difficult to treat as time passes. However, if you clear fallen leaves, you can reduce your chances of an outbreak.

You can protect your box hedges from this disease by improving the cultural conditions in your garden. This includes pruning and irrigation management. Also, keep in mind that this disease is resistant to some boxwood cultivars. Choosing cultivars with low susceptibility can decrease your risk of acquiring this disease.