What is wrong with my Japanese Holly plant?
Japanese hollies perform best in U.S. Department of Agriculture hardiness zones 6 to 8. Black root rot disease is a fungal infection that affects Japanese holly plants. Caused by the fungal pathogen Thielaviopsis basicola, black root rot is a soilborne disease that may also survive on decaying plant material.
Is Japanese holly an evergreen?
She is also a member of The Spruce Gardening and Plant Care Review Board. Japanese holly ( Ilex crenata) is an evergreen shrub with a dense branching pattern. It looks similar to boxwoods, and many growers enjoy using it as a lush hedge or border in the landscape.
Where do you plant compact Japanese holly?
A Compact Japanese Holly likes full to partial sun so it’s important to plant them where they’ll get plenty of sunlight. I love using them on either side of the front door. We tend to build a lot of Modern and Farmhouse style homes which both look great with a few green plants.
Are black vine weevils harmful to Japanese Hollies?
However, when black vine weevils (Otiorhynchus sulcatus) infest Japanese hollies, they may result in cosmetic damage or plant death. Black vine weevils are gray to brown-black with snouted faces and short, stocky bodies measuring approximately three-eighths inch in length.
Are holly plants invasive?
Holly Isn't Noxious, But it is Invasive Very few culturally and economically significant species receive the noxious weed designation. Although not listed as noxious, holly is widely recognized as an invasive plant in our region. New holly plants can quickly dominate the under story of our forests.
How big do Japanese holly trees get?
6 to 10 feet tallThis dense, evergreen holly reaches 6 to 10 feet tall and at least as wide. The species is rarely used in landscapes, but there are many cultivars available with more interesting shape and color. This plant grows slowly, but can be invasive.
Where is holly invasive?
English holly has attractive glossy leaves and red berries but it is also an invasive plant in Pacific Northwest forests.
Is Japanese holly fast growing?
This form of Japanese holly, Ilex crenata 'Convexa', is fast growing and is a very good hedge either sheared or un-sheared. It is a handsome utility plant that is durable alternative to the slower growing boxwood.
Can you keep Japanese holly small?
Japanese hollies can be lightly pruned or sheared almost any time of year. Hard pruning, to rejuvenate an old and tired plant or to reduce the size of a plant that has outgrown the space it was intended to fill, should be performed in late winter before new spring growth begins to emerge.
Do Japanese holly have deep roots?
Dig down about two feet and out three feet as you mix and cultivate the soil. Japanese hollies have fairly shallow, fibrous roots, as well as a main taproot that doesn't grow too deep unless you have dry soil.
How do I get rid of invasive holly?
Cut down the tree and dig out the soil around the stump up to the root level. After that, you can either pull the stump out using machinery or cut part of it out using a chainsaw. 2. You can also gradually kill the holly bush.
How do you get rid of invasive holly?
1:081:47How to Remove Holly - YouTubeYouTubeStart of suggested clipEnd of suggested clipCompletely around the bottom of the Holly stem. You want to firmly place your foot on the base ofMoreCompletely around the bottom of the Holly stem. You want to firmly place your foot on the base of the weed wrench. And simply pull back and let the tool use its leverage to pop the root. Out.
How do you get rid of holly trees?
Use a spade shovel to work your way around the stump of the holly tree, creating a trench to expose the buried roots. Use a chopping ax to separate the roots from the stump. Insert a landscaping bar underneath the stump and pry upward to break any existing roots and to remove the stump from its hole.
Can Japanese holly be a hedge?
Like boxwood, Japanese holly plants tolerate shearing, which makes the shrub a good choice for an evergreen hedge.
How far apart should you plant Japanese holly?
This is a great shrub for building an easy to maintain hedge. Plant 3 feet apart for a tight hedge. Shape this shrub to get the exact look you want, whether you prefer a rounded or more angular look.
How deep are Japanese holly roots?
Dig around the Japanese holly at a 2-foot distance from the main plant trunk. Begin removing soil to expose the roots. Take your time with digging to avoid damaging the existing root system. Japanese holly roots tend to travel about 10 to 12 inches deep into the soil bed.
What is the name of the Japanese holly?
Ilex crenata ‘Convexa’ in the Entry Courtyard (photo by Corinne Kennedy) Japanese holly ( Ilex crenata) is a broadleaf evergreen shrub that doesn’t call attention to itself. With insignificant flowers, small leaves and small black berries, it lacks the distinguishing characteristics that attract potential buyers to showier plants.
What is the most commonly shaped Japanese holly?
Evergreen azaleas, especially the late-blooming Satsuki types, are the plants most commonly shaped into these forms, but Japanese holly is also used. Shaped as tamamono, both plants contribute mass and stability to our Seattle Japanese Garden, and play a part in creating the simplicity and tranquility that visitors encounter here.
What is the temperature of Ilex crenata?
Most forms are hardy to at least USDA Zone (minimum temperature, 0-10 degrees F.) Ilex crenata ‘Mariesii’ in Area F. Foliage and berries of Ilex crenata 'Mariesii" (photo by Chie Iida) As mentioned above, the species plant ( Ilex crenata) is variable in its characteristics, and as a result isn’t commonly available.
What is the shape of a holly tamamono?
Japanese holly tamamono along the Eastern path of the garden. The most important are tamamono (a low, mounded shape at least twice as wide as tall) and o-karikomi (a wavelike shape of connected tamamono forms).
Where does Ilex Crenata live?
Ilex crenata is native to Japan, Korea, China, Taiwan, the Philippines and the Himalayas, and displays great variability (in height, habit, and leaf size & shape) over its range. In the wild, it grows in remarkably diverse habitats – including mountains, seashores, swamps, and dense forests. Japanese holly’s popularity can be attributed in large ...
How many cultivars are there in the Seattle Japanese Garden?
More than 500 cultivars (cultivated varieties) have been developed -- and given names (or sometimes only numbers). The Seattle Japanese Garden includes seven cultivars, in addition to the species plant, which grows in Areas C, D, K, O, V & W ( map ).
Is Ilex crenata good for bonsai?
Ilex crenata is planted extensively in landscapes, but because of its stiff habit, is less useful for bonsai. In Japanese-style gardens, including our own, it’s sometimes allowed to achieve a natural shape, or else is pruned to reveal the underlying architectural of its branching.
What is a problem with Japanese Holly?
Japanese holly shrubs (Ilex crenata) make a substantial impression in the home garden. Whether used as a screen, hedge or in mass plantings, Japanese holly is prized for its contrasting mix of delicate foliage and a sturdy constitution. However, the reliability of these evergreens does not protect them from ...
What causes black rot on Japanese holly?
Black root rot disease is a fungal infection that affects Japanese holly plants. Caused by the fungal pathogen Thielaviopsis basicola, black root rot is a soilborne disease that may also survive on decaying plant material. Fungi spread through infected soil while spores are carried on water. Disease occurs mostly in cool, wet soil with a temperature range of 55 to 65 degrees Fahrenheit, according to the University of Kentucky Cooperative Extension Service. As its name suggests, black root rot results in blackened areas of dying plant tissue on roots as well as discolored, wilting leaves, leaf drop and slowed or stunted growth. Plants left untreated will die.
How to control black root rot on Japanese hollies?
In addition, applying a fungicide drench with active ingredients such as thiophanate methyl offers effective control.
Do Japanese hollies like full sun?
Japanese hollies prefer areas of the landscape that offer full sun to partial shade for best growth. Although these shrubs will develop successfully in most soil conditions, they thrive in moist, well-drained soil with an acid pH. Japanese hollies perform best in U.S. Department of Agriculture hardiness zones 6 to 8.
Where To Plant A Compact Japanese Holly
A Compact Japanese Holly likes full to partial sun so it’s important to plant them where they’ll get plenty of sunlight. I love using them on either side of the front door. We tend to build a lot of Modern and Farmhouse style homes which both look great with a few green plants.
How Much Water Do Japanese Hollies Need?
In general, a Compact Japanese Holly should be watered at least twice a week. However, if you live in an area that sees very hot temperatures I would water them daily.
How Big Does A Compact Japanese Holly Get?
The Compact Japanese Holly is an evergreen shrub, but unlike its 10 foot tall parent, it will only grow to 6 feet high and wide. The smaller size makes it a great choice for compact areas, as a border shrub, in pots or as an accent.
Does A Compact Japanese Holly Need Pruning?
Yes and No. They don’t need much pruning, but if you want to shape them then it’s required. That really nice ball shape isn’t natural.
Compact Japanese Holly Care
Overall, Compact Japanese Hollies are very hardy plants that need little care.
Are Compact Japanese Holly Deer Resistant?
Yes, Compact Japanese Hollies are very resistant to deer. If this is an issue for you then definitely give Japanese Hollies a try. Here in NJ we have deer everywhere and it’s hard to keep them out. They can jump right over a 6 foot high fence. They snack on just about all the other bushes and plants but they never touch the Hollies.
How Far Apart Should Compact Japanese Hollies Be Spaced?
If your trying to build a hedge with Compact Japanese Hollies, the correct spacing is about 4 feet apart. They can grow around 6 feet around so 4 feet will allow the hollies to touch but not crush each other.
