Overview
Philadelphus lewisii Pursh var. angustifolius (Rydb.) Hu. is a shrub species native to North America. It is a member of the hydrangea family, and is sometimes referred to as the western mock orange or narrow-leaved mock orange.
Appearance
The narrow-leaved mock orange typically grows to be 5-15 feet in height, with a spread of 4-8 feet. The shrub has an upright habit, with arching branches covered in glossy, medium green leaves. The leaves are narrowly oval and can grow up to 3 inches long. In spring and early summer, the plant produces highly fragrant white flowers that are showy and abundant. The flowers are arranged in clusters, with each cluster containing 3-8 individual flowers. The blooms are followed by capsule fruit that is not considered ornamental.
Native Range and Habitat
The species is native to the western United States, and can be found in a wide variety of habitats including moist open woods, riparian areas, forest edges, and meadows. The narrow-leaved mock orange is also commonly found along stream banks, where it can tolerate periods of flooding.
Uses
The narrow-leaved mock orange has some traditional medicinal uses, as Native Americans have used it for centuries to treat various ailments. It is primarily used as an ornamental plant, however, and is prized for its fragrant blooms and attractive foliage. This shrub is often planted in mixed borders, as a specimen plant, or as a hedge. It is tolerant of a wide range of soil types, making it a versatile addition to many different garden settings.
Light Requirements
Philadelphus lewisii Pursh var. angustifolius requires full sun to partial shade for optimum growth. It can tolerate some shade, but too much shade can lead to leggy growth and fewer flowers.
Temperature Requirements
This plant is native to the Western United States, including areas with hot, dry summers and cold winters. It is adapted to a wide range of temperatures, from as low as -20°F to as high as 100°F. However, it grows best in areas with a moderate climate with average temperatures between 60-80°F.
Soil Requirements
Philadelphus lewisii Pursh var. angustifolius prefers well-drained soil that is rich in nutrients. It can grow in a wide range of soil types, including sandy, loamy, and rocky soils, but it thrives in soils with a pH between 5.5 and 7.5. The plant does not tolerate waterlogged soil, which can cause root rot, so it is important to ensure good drainage.
Cultivation Methods for Philadelphus lewisii Pursh var. angustifolius (Rydb.) Hu
The Philadelphus lewisii Pursh var. angustifolius (Rydb.) Hu plant is native to North America and grows well in USDA hardiness zones 3 to 8. It prefers full sun to part shade and well-draining soil. Planting should be done in the early spring or fall.
When planting, make sure the hole is at least two times larger than the root ball. The plant should be planted at the same depth as it was in the container, with the top of the root ball level with the soil surface. Ensure that there is enough space between each plant to allow for proper growth.
Watering Needs for Philadelphus lewisii Pursh var. angustifolius (Rydb.) Hu
The Philadelphus lewisii Pursh var. angustifolius (Rydb.) Hu plant requires regular watering, especially during the first year of growth. Water the plant deeply at least once a week, ensuring that the soil is moist but not waterlogged.
During hot and dry weather, it may be necessary to water the plant more frequently. Always make sure the soil has dried out before watering to reduce the risk of overwatering.
Fertilization of Philadelphus lewisii Pursh var. angustifolius (Rydb.) Hu
The Philadelphus lewisii Pursh var. angustifolius (Rydb.) Hu plant benefits from fertilization during the growing season. Apply a balanced fertilizer, such as a 10-10-10 or 20-20-20 fertilizer, in the spring once new growth has started.
Follow the instructions on the fertilizer packaging for the correct application rate. Do not over-fertilize, as this can lead to excessive growth and weaken the plant.
Pruning of Philadelphus lewisii Pursh var. angustifolius (Rydb.) Hu
The Philadelphus lewisii Pursh var. angustifolius (Rydb.) Hu plant benefits from regular pruning to promote healthy growth and improve flowering. Pruning should be done in the late winter or early spring before new growth starts.
Cut back any dead or diseased wood to healthy wood. Thin out the center of the plant to increase air circulation, and remove any crossing branches. To promote flowering, cut back the tips of the previous year's growth by one-third.
Propagation of Philadelphus lewisii Pursh var. angustifolius
Philadelphus lewisii Pursh var. angustifolius (Rydb.) Hu, commonly known as Dwarf Mockorange or Narrowleaf Mockorange, is a deciduous shrub native to the western United States. It produces fragrant white flowers in late spring to early summer, making it a popular ornamental plant choice for many gardeners.
Propagation methods
There are several methods of propagating Philadelphus lewisii Pursh var. angustifolius, including:
1. Seed propagation:
The most common method of propagation for Philadelphus lewisii Pursh var. angustifolius is through seed propagation. Seeds can be sown in the fall or early spring in well-draining soil. The seeds should be barely covered with soil, and the soil should be kept moist until germination occurs. Seedlings can be transplanted after one to two years, depending on size.
2. Softwood cutting propagation:
Softwood cutting propagation is another method that can be used to propagate Philadelphus lewisii Pursh var. angustifolius. This method involves taking softwood cuttings in early summer and rooting them in a well-draining soil mix. Cuttings should be watered regularly and kept in a humid environment until roots develop. The new plants can be transplanted after a few weeks.
3. Hardwood cutting propagation:
Hardwood cutting propagation is another method that can be used to propagate Philadelphus lewisii Pursh var. angustifolius. This method involves taking hardwood cuttings in the winter and rooting them in a well-draining soil mix. Cuttings should be watered regularly, but not overwatered, and kept in a humid environment until roots develop. The new plants can be transplanted after several weeks.
4. Division propagation:
Division propagation involves dividing an established plant into smaller sections and replanting them to create new plants. This method should only be used on older plants that have become crowded or overgrown. The plant can be divided in the spring or fall, and the sections should be replanted immediately in well-draining soil.
Overall, Philadelphus lewisii Pursh var. angustifolius is a hardy plant that can be easily propagated through a variety of methods. Gardeners can choose the method that works best for their needs, whether it be seed propagation, cutting propagation, or division propagation.
Disease and Pest Management for Philadelphus lewisii Pursh var. angustifolius (Rydb.) Hu
Philadelphus lewisii Pursh var. angustifolius (Rydb.) Hu, commonly known as Lewis' mock orange, is a deciduous shrub that can be vulnerable to a range of pests and diseases. Here are some of the most common issues you might encounter, along with tips for managing them.
Pests
Aphids: These tiny, pear-shaped insects can suck sap from the leaves and stems, causing distortion, yellowing, and stunted growth. You can knock aphids off the plant with a strong jet of water or spray them with insecticidal soap or neem oil.
Mites: These arachnids are too small to see with the naked eye, but you may notice webbing on the leaves and branches. Mites can cause bronzing, curling, and premature leaf drop. You can discourage mites by hosing down the plant regularly and making sure it's well-watered.
Caterpillars: The larvae of certain moths and butterflies can munch on Philadelphus leaves, causing holes and ragged edges. You can pick off caterpillars by hand or use Bacillus thuringiensis (Bt), an organic bacterial spray that kills the insects without harming beneficial species.
Diseases
Powdery Mildew: This fungal disease can cause a white, powdery coating on the leaves, leading to yellowing and defoliation. You can prevent powdery mildew by providing good air circulation, avoiding overhead watering, and removing infected leaves and branches.
Leaf Spot: This bacterial or fungal disease can result in brown or black spots on the leaves, which may merge and cause defoliation. You can minimize leaf spot by watering at the base of the plant, removing fallen leaves, and avoiding excessive fertilization.
Root Rot: This fungal disease is caused by overly wet soil, which can lead to yellowing, wilting, and death of the plant. You can prevent root rot by ensuring good drainage, avoiding overwatering, and planting in well-draining soil.
By following these tips, you can help keep your Philadelphus lewisii Pursh var. angustifolius (Rydb.) Hu healthy and thriving for years to come.
