The Crataegus ×collicola Ashe: Overview
The Crataegus ×collicola Ashe is a small tree or shrub that belongs to the rose family. It is a hybrid species resulting from the cross-pollination of two species, Crataegus crus-galli and Crataegus submollis. This plant is commonly known as Collicola hawthorn or Aspen-leaf hawthorn.
Appearance of Crataegus ×collicola Ashe
The foliage of the Crataegus ×collicola Ashe is deciduous and its leaves are deeply lobed, resembling those of Aspen trees. They are shiny green in color during the summer, turning to orange and reddish-brown hues in the fall. This hawthorn tree produces small, fragrant white flowers in the spring, which eventually turn into bright red berries. The plant typically grows up to 10-15 feet tall and prefers moist soils in full sun to partial shade.
Origins of Crataegus ×collicola Ashe
The Crataegus ×collicola Ashe is native to the United States and is found in the central and eastern regions, particularly in the states of Indiana, Illinois, and Ohio. This hawthorn tree is a hybrid species, meaning it was created through the intentional or unintentional cross-pollination of two closely-related species.
Uses of Crataegus ×collicola Ashe
Crataegus ×collicola Ashe has several uses. Its berries are edible, although they are not commonly used as food because of their sour taste. The plant is also used for ornamental purposes due to its attractive, colorful foliage and fragrant flowers. Hawthorn trees, in general, have been used for medicinal purposes for centuries. They are believed to help support cardiovascular health by regulating blood pressure and cholesterol levels.
In conclusion, the Crataegus ×collicola Ashe is a beautiful tree, valued for its attractive foliage and fragrant flowers. It is native to the United States and has several uses including ornamental purposes, food, and medicinal uses.
Growth Conditions for Crataegus ×collicola Ashe
Crataegus ×collicola Ashe, commonly known as hills hawthorn, is a small deciduous tree that is native to the southeastern regions of the United States. The tree can grow up to a height of 15-25 feet and has a spread of up to 15 feet. The growth conditions that promote healthy growth of hills hawthorn include:
Light
Hills hawthorn grows best in full sun to part shade. The tree requires at least six hours of direct sunlight to thrive. Partial shade is also necessary in hotter climates to prevent scorching.
Temperature
Hills hawthorn is hardy, and it grows best in temperate climates. The tree can tolerate temperatures as low as -20°F and as high as 100°F. The optimum temperature range for this tree is 65°F – 75°F.
Soil Requirements
Hills hawthorn is adaptable to various soil types, but it thrives in well-draining loamy soil. The soil should be slightly acidic, with a pH range of 6.0 – 7.5. Poorly drained, clay soils should be avoided because they can cause root rot. Adding organic matter to the soil is beneficial since it improves soil structure and fertility.
Proper growth conditions are essential for the optimal growth of hills hawthorn. By providing sufficient sunlight, moderate temperatures, and suitable soil, one can maintain healthy growth and ensure a thriving tree.
Cultivation methods
Crataegus ×collicola Ashe, commonly known as Pear hawthorn, can be propagated from its seeds or stem cuttings. It prefers full sun to partial shade and well-draining soil that is moderately fertile. The plant grows well in different soil types, from loamy to sandy soils with a pH range of 6.0 to 7.5.
Watering needs
Pear hawthorn plants require moderate watering. It thrives in moist soil, so ensure to water regularly, especially during dry weather conditions. However, avoid overwatering to prevent root rot, which might cause the plant's death.
Fertilization
The plant's nutrient uptake usually decreases during the winter season, so it would be best to fertilize it during the spring and early summer. Use a balanced fertilizer, containing nitrogen, phosphorus, and potassium, in the ratio of 10-10-10. Always follow the package instructions to prevent fertilizer burns. Alternatively, work in some organic matter, such as compost or well-rotted manure, into the soil to improve fertility.
Pruning
Pruning is necessary to maintain the plant's shape and remove any dead, diseased or damaged branches. Prune when the plant is dormant, either in late winter or early spring. To maintain its natural form, avoid over-pruning. Cut off about one-third of the branches, trim off the tips of the remaining ones, and remove any downward-growing branches.
Propagation of Crataegus ×collicola Ashe
Crataegus ×collicola Ashe, commonly known as Blue Ridge hawthorn, is a deciduous shrub that belongs to the rose family (Rosaceae). It is a hybrid species that results from the cross-pollination of two species, Crataegus flava and Crataegus intricata. The plant is native to the southeastern United States and is hardy in USDA zones 6 to 8.
There are several methods for propagating Crataegus ×collicola Ashe. Some of the common propagation methods are described below:
1. Seed propagation
Seed propagation is the most common method for propagating Crataegus ×collicola Ashe. Collect the seeds from the plant during the fall season when they are fully matured. The seeds need to be stratified before planting to break their dormancy. Mix the seeds with moist sand and store them in a refrigerator for about two months. After stratification, plant the seeds in a well-draining soil mixture and keep them moist.
2. Cutting propagation
Another way to propagate Crataegus ×collicola Ashe is through cuttings. Take semi-hardwood cuttings in late summer or early fall after the new growth has ripened. Dip the cuttings in rooting hormone and plant them in a well-draining soil mixture. Place the pots in a bright, warm location, and keep the soil moist until the cuttings have rooted.
3. Grafting propagation
Grafting is a propagation method that involves joining the top part of one plant, the scion, with the rootstock of another plant. This method is used to propagate Crataegus ×collicola Ashe because it can improve plant vigor, disease resistance, and fruit quality. The best time to graft is during the dormant season (late winter or early spring) when both the scion and rootstock are not actively growing.
Propagation of Crataegus ×collicola Ashe is relatively easy and can be done using any of these methods. Propagating your own plants allows you to maintain genetic diversity, preserve cultivars, and produce plants that are better adapted to your local climate and soil conditions.
Disease Management for Crataegus ×collicola Ashe
Crataegus ×collicola Ashe, also known as the Hill's Hawthorn, is a hybrid species that belongs to the Rosaceae family. It is a popular small tree that is grown for its attractive appearance and low maintenance requirements. However, like other plants, it is also prone to certain plant diseases that can affect its growth and overall health. Here are some common diseases of Crataegus ×collicola Ashe and tips on how to manage them:
Fire Blight
Fire blight is a bacterial disease that is characterized by blackening and wilting of branches and stems. The disease is caused by the bacterium Erwinia amylovora, and it can spread rapidly, particularly during warm and humid weather conditions. To manage fire blight, prune the affected branches as soon as possible, and dispose of them properly. You should also sterilize your pruning tools before and after pruning to avoid spreading the disease to healthy plants.
Cedar Apple Rust
Cedar apple rust is a fungal disease that affects the leaves and fruit of Crataegus ×collicola Ashe and other Rosaceae plants. It is caused by the fungus Gymnosporangium juniperi-virginianae and is more common in areas with high humidity. The disease can cause significant damage if not managed timely. Copper-based fungicides can help to reduce the incidence of cedar apple rust. You should also remove the galls that form on the Juniperus plants as they can act as a host for the disease.
Pest Management for Crataegus ×collicola Ashe
Crataegus ×collicola Ashe is relatively pest-resistant. However, some common pests may affect the plant's growth and appearance. Here are some common pests of Hill's Hawthorn and tips on how to manage them:
Aphids
Aphids are small insects that feed on the sap of plants. They can affect the growth and appearance of Crataegus ×collicola Ashe, but they do not cause significant damage. Spraying the plant with a strong jet of water can help to dislodge the aphids. You can also use insecticidal soap to manage the pest.
Scales
Scales are small, flat insects that attach themselves to the stems and leaves of plants. They can cause discoloration and damage the plant's growth if not managed in time. You can remove small infestations of scales using a cotton swab dipped in alcohol or by pruning the affected branches. For severe infestations, use a horticultural oil spray.
