Overview
Crataegus ×immanis Ashe (pro sp.) is a hybrid tree that belongs to the family Rosaceae. This plant is a natural hybrid of Crataegus flava and Crataegus mollis, and it is widely known for its aesthetic appeal.
Origin
The plant is native to North America, specifically the southeastern United States. It can be found in the wild in the states of Alabama, Georgia, Kentucky, Mississippi, and Tennessee.
Common Names
The common names of Crataegus ×immanis Ashe (pro sp.) include Bigfruit Haw, Large-fruit Cockspur-thorn, Apple Hawthorn, and Imman's Hawthorn.
Appearance
This plant is deciduous and can grow up to 30 feet tall. Its bark is grayish-brown and has several branches. The leaves are dark green and have a leathery texture. The plant produces white flowers that have a strong, pleasant fragrance. The fruit is a large, red pome that can be 3/4 to 1 inch in diameter.
Uses
Crataegus ×immanis Ashe (pro sp.) has several uses. It is widely used as an ornamental tree in parks and gardens due to its beautiful flowers and berries. The fruit of the tree is also edible and can be used to make jelly and jams. The medicinal properties of the tree have also been recognized, and it is used as a herbal treatment for various ailments such as heart disease and high blood pressure.
Light Requirements
The plant Crataegus ×immanis Ashe (pro sp.) prefers full sun, but it can tolerate partial shade. It needs at least 6 hours of direct sunlight per day to thrive. If the plant is grown in a shaded area, it may produce fewer flowers and fruits and may become more susceptible to pests and diseases.
Temperature Requirements
The Crataegus ×immanis Ashe (pro sp.) plant grows best in temperate regions and can tolerate a wide range of temperatures, from -40°C to 40°C. Ideally, the plant should be grown in a location with a temperature range of 15°C to 24°C. In cold regions, the plant may require protection from frost, while in warmer regions, it may require regular watering to prevent drought stress.
Soil Requirements
The Crataegus ×immanis Ashe (pro sp.) plant prefers well-drained soil with a pH range of 6.0 to 7.0. It can tolerate a range of soil types, including sandy, loamy, and clay soils. The plant prefers soil that is rich in organic matter and requires regular fertilization to maintain healthy growth. It is important to avoid planting the Crataegus ×immanis Ashe (pro sp.) plant in waterlogged or compacted soil, as this can restrict root growth and inhibit nutrient uptake.
Cultivation
Crataegus ×immanis Ashe (pro sp.) is a relatively low-maintenance plant and can adapt to various growing conditions. It grows best in well-drained soils that are slightly acidic, with a pH range of 5.5 to 7.5. The plant thrives in full sun but can also tolerate partial shade. Crataegus ×immanis Ashe (pro sp.) is hardy in USDA zones 4-8 and can grow up to 20 feet tall and wide. To ensure proper growth, plant the tree away from strong winds, as it can be susceptible to branch breakage.
Watering Needs
Water is essential for Crataegus ×immanis Ashe (pro sp.) to grow and thrive. The plant requires regular watering during the growing season, especially during hot and dry weather conditions. It is advisable to water the plant to a depth of at least 6 inches, preferably once or twice a week, depending on the soil type and weather conditions. Overwatering should be avoided as it can lead to root rot.
Fertilization
Crataegus ×immanis Ashe (pro sp.) requires very little fertilization as the plant can thrive on soil nutrients. However, a light application of fertilizer during the early spring can give the tree a boost. A slow-release fertilizer applied around the root zone can help promote healthy growth. It is essential to avoid overfertilizing the plant, as it can result in poor growth and excessive foliage.
Pruning
Regular pruning is important for maintaining the health and shape of Crataegus ×immanis Ashe (pro sp.). The best time to prune the tree is during the late winter or early spring before new growth appears. Dead, diseased, or damaged branches should be removed to promote healthy growth. Pruning can also reduce the risk of branch breakage. It is essential to avoid over-pruning the tree as it can lead to reduced fruit production and poor growth.
Propagation of Crataegus ×immanis Ashe (pro sp.)
Crataegus ×immanis Ashe (pro sp.), commonly known as the big hawthorn, is a deciduous shrub or small tree that belongs to the Rosaceae family. The plant is native to North America and grows up to a height of 15 to 25 feet.
One of the easiest ways to propagate Crataegus ×immanis Ashe (pro sp.) is by using seeds. The seeds can be extracted from ripe fruits and planted directly into the ground or in seed trays. The seeds should be covered with a thin layer of soil and kept moist until they sprout.
Another method of propagation is by using cuttings. Softwood cuttings taken during spring or early summer can be used to propagate the plant. It is recommended to take cuttings from the previous year's growth. The cuttings should be approximately 6 inches in length and should have a few leaves. The cuttings should be dipped in rooting hormone and planted in a well-draining potting mix. The cuttings should be kept moist, and in a few weeks, they should root and start to grow.
Grafting is another method used to propagate Crataegus ×immanis Ashe (pro sp.). It involves attaching a scion from the desired plant onto a suitable rootstock. Grafting is a method that is commonly used to produce hybrid cultivars, such as Crataegus ×immanis Ashe (pro sp.).
Overall, the propagation of Crataegus ×immanis Ashe (pro sp.) can be achieved by using seeds, cuttings, or grafting. Each method has its advantages and disadvantages, and the choice of propagation method depends on the grower's preferences and needs.
Disease and Pest Management for Crataegus ×immanis Ashe
Crataegus ×immanis Ashe is a hybrid of two hawthorn species that are native to North America. This tree is generally healthy and not susceptible to many diseases or pests. However, some issues may arise that can affect the plant's growth and appearance. Proactive management can help to maintain the health of the tree.
Common Diseases
Hawthorns are susceptible to several fungal diseases. Leaf spot, caused by the fungus Diplocarpon mespili, can cause brown or black spots on the leaves. Cedar-apple rust, caused by the fungus Gymnosporangium juniperi-virginianae, can cause yellow spots. Fire blight, caused by the bacterium Erwinia amylovora, can cause leaves and branches to wilt and turn brown or black.
To manage fungal diseases, it is important to maintain good air circulation around the tree. Prune the plant to remove any dead or diseased wood. Remove fallen leaves and other debris from around the tree, as this can harbor fungal spores. Use a fungicide according to the manufacturer's instructions, if necessary.
Fire blight can be very serious and may require the removal of infected branches or even the entire tree. Insecticide sprays can be used to control the insects that spread the disease.
Common Pests
Several species of insects can infest Crataegus ×immanis Ashe. Aphids, spider mites, and scale insects are the most common. These insects suck sap from the leaves and stems, which can cause yellowing, stunted growth, and deformation of the leaves and branches.
To control these pests, it is important to keep the tree healthy. Regular watering and fertilization can help the tree to resist infestations. Insecticidal soap or oil can be used to control mild infestations. Neem oil or other horticultural oils can be used to control more severe infestations. For persistent infestations, contact a licensed pest control professional.
Overall, proper care and maintenance can help to keep Crataegus ×immanis Ashe healthy and free of disease and pests. Regular inspection and prompt management of any issues that arise are essential for the tree's health and longevity.
