Phenology: Bloom Period: April-May. Fruits ripen September-October. Propagation: Seeds should be stratified for 90 days at 40º*F. (4ºC) or planted outside as soon as they are ripe– seeds should not be allowed to dry out.
Appearance: Oregon grape is a perennial leafy bush, from 2 to 5/6 ft in height, covered in thick, waxy, prickly pinnate leaves. Harvesting: Since Oregon Grape is a perennial plant, It is best to collect the roots and lower stems from mid-summer to winter and Read more
Potting and Repotting Oregon Grape Planted in containers, Oregon grape is a remarkably stunning plant. Best grown from seed, you can set your containers up in the fall. If potting a mature plant, remember that they have deep roots, so plant them in large pots Read more
Oregon Grape is deer resistant. The sharp spiny leaves make formidable natural barriers. The plant does not require regular fertilization. A bit of compost over the root zone will help it retain moisture and reduce weeds).
Caring for Grape Holly Plant Both Oregon grape holly and creeping Mahonia is easy to care for. A layer of organic mulch around the plants will help the soil retain moisture and reduce competition from weeds. Prune the plants and remove suckers and seedlings as Read more
Mahonia aquifolium, Oregon grape or holly-leaved berberry, is a species of flowering plant in the family Berberidaceae, native to western North America.
Wildlife – Oregon Grape flowers attract beneficial insects to the landscape. Birds love Oregon Grape berries in the summer and, since the fruit dries on the shrub in fall, dine on it in winter when other food is scarce.
A species from east of the Cascades, low Oregon grape will grow happily in full sun to full shade; it is the most successful for perpetually dry shade and once established is drought tolerant even in sunny conditions. Full sun and winter cold give the Read more
Hardy in U.S. Department of Agriculture plant hardiness zones 5 through 9, Oregon grape spreads by rhizomatous roots to cover a large area and the creeping variety is frequently planted as a groundcover. Herbicides containing dicamba, 2,4-D, glyphosate or triclopyr will kill it.
Mahonia repens Low, or Creeping Oregon Grape A species from east of the Cascades, low Oregon grape will grow happily in full sun to full shade; it is the most successful for perpetually dry shade and once established is drought tolerant even in sunny conditions. Read more
Oregon grape (Mahonia aquifolium or Berberis aquifolium) is a medicinal herb from the plant family of Berberidaceae. Long before the Europeans and other immigrants began to arrive in America, indigenous tribes used Oregon grape for many ailments including fever, arthritis, jaundice, diarrhea, and other maladies.
When starting Oregon Grape seeds indoors, place them in moistened planting mix and store them in the refrigerator for 3 weeks prior to sowing. Maintain a temperature of 50° in the growing medium until germination, which takes about 6 weeks if the seeds are fresh.
Growth: Tall Oregon Grape grows to about 6-8 feet (2-2.5m) tall and spreads by underground stems to about 5 feet (1.5m) wide. It may grow slowly at first as it becomes established, then will quickly grow to its mature size.
Mahonia repens Low, or Creeping Oregon Grape A species from east of the Cascades, low Oregon grape will grow happily in full sun to full shade; it is the most successful for perpetually dry shade and once established is drought tolerant even in sunny conditions.
Oregon grape grows best from seed, and those should be planted in the fall. It grows slowly at first, but as it ages, it quickly grows to maturity. In April and May, clusters of cheery yellow flowers appear.
This shrub is best suited for USDA Zones 5-9. It is native to western North America. Partial shade is ideal for this species. It can also be grown in full shade or full sun, though too much light can cause foliage scorching.
About Oregon Grape It has a low profile, rarely growing taller than 10 feet (3 m) and forming irregular, often scraggly-looking clumps. Starting in April, the shrub will produce brilliant bursts of yellow flowers – Oregon's official state flower.
All of NHV's supplements that contain Oregon Grape are formulated specifically to be a safe dosage for pets based on their weight. This herb is not safe for pregnant and lactating pets as it can stimulate uterine contractions and can be transmitted to breast milk.
Caring for Grape Holly Plant Both Oregon grape holly and creeping Mahonia is easy to care for. The plants are drought tolerant and only need watering during extended dry spells. A layer of organic mulch around the plants will help the soil retain moisture and Read more
Culture: Grows best in partial sun - though some species can thrive in full shade to full sun - rich acidic soil, and to moist to dry conditions. Avoid planting Oregon grape in soil that is compacted, wet, or too alkaline; plants should also be Read more
Oregon grape can be used as part of a wildlife garden to attract butterflies, bees, hummingbirds, and other birds to your yard. This shrub can clone itself and spread. On one hand, this can be a useful feature as you can use it to populate Read more
When applied to the skin: Oregon grape cream is POSSIBLY SAFE for most people when applied directly to the skin. It can cause some side effects such as itching, burning, irritation, and allergic reactions.
It's also a food source for birds and small mammals. Among birds that will eat the berries are forest birds such as grouse and pheasants as well as common songbirds such as robins, waxwings, juncos, towhees and sparrows. Small mammals include foxes, coyotes and raccoons.
Habit: Oregon grape typically grows 3 to 6 feet tall with a similar spread. Season: With year-round gorgeous foliage and stunning flowers in spring, Oregon grapes look beautiful through any season.
It can also be grown in full shade or full sun, though too much light can cause foliage scorching. Try to find a planting location that offers some shelter from the wind. Since these are evergreen and do not drop in the fall, the leaves Read more
– Once grape vines lose their leaves, the plants fade into the background of the winter landscape. That's the time to take action and get out the clippers. January through the first of March is the season to prune your vines, said Bernadine Strik, a Read more
If your Oregon grape seems to be a suckering type, just cut off any stems where you do not want them to be growing. If your Oregon grape is a ground cover, prune it only if it grows too tall. Cutting stems to the ground Read more
The inner bark of the larger stems and roots of Oregon grape yields a yellow dye; the berries give purple dye. As the leaves of Oregon grape are holly-like and resist wilting, the foliage is sometimes used by florists for greenery and a small gathering Read more
Dig a hole about 12 inches deep and about as wide as the branch-spread of the mahonia you are transplanting. Set the soil aside on a plastic sheet. Improve the soil in the bottom of the hole by adding and mixing in about one-third compost. Read more
One of the most popular uses of Oregon-grape is for landscaping. It is attractive, tidy and easy to care for. The flowers attract beneficial insects and the berries are food for wild birds.
AgriNet is a free weather station widely used by growers to determine how much water they need to irrigate their crops. AgriMet estimates wine grapes need 20.2 inches of water per year in southern Oregon.
Smell: Oregon grapes are grown in clusters, and if all the grapes have gone bad, they will have a foul smell of rotten berries.
Mahonia Rust As the disease progresses, brown pustules, called aecia, appear on the undersides of mature leaves. After the aecia release their spores, tiny holes riddle the leaves. Severely rusted mahonia foliage may distort, pucker and drop prematurely.
Cause The fungus Erysiphe berberidis (formerly Microsphaera berberidis) has been identified. This disease was observed widespread during the summer of 2002 on landscape plants in western Oregon and Washington. Only conidia were observed during the growing season. No chasmothecia have been observed.
Symptoms The most common signs of this disease are white, powdery fungal colonies up to 1 cm in diameter on the upper surfaces of leaves. This fungal growth can easily be removed by wiping the leaf surface. Colonies frequently grew together and covered the entire Read more
This broadleaf evergreen needs little pruning, but when it is done, should be done after the flowers are spent. Young shrubs respond very well to fertilizing. Either granular, liquid or stake type fertilizers can be used.
It can handle nearly full sun to shade, but being a woodland species often found growing in somewhat open forests, it prefers some shade (although very deep shade will result in fewer flowers and fruit).
Water frequently in summer (every 2 days) and moderately the rest of the year. They do not usually need pruning.
The various species of Oregon grape seldom need pruning. If your Oregon grape is a ground cover, prune it only if it grows too tall. Cutting stems to the ground will encourage compact and dense growth. Oregon grape is definitely a low maintenance plant.
This broadleaf evergreen needs little pruning, but when it is done, should be done after the flowers are spent. Prune branch tips back to increase density and direct the plants growth. Any pruning at this time will remove this years fruit, but it will not Read more