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Leaf scorch on Japanese aralia (Fatsia japonica), spotted laurel (Aucuba japonica 'Variegata'), and rhododendron
Japanese aralia and spotted laurel are shade-loving plants that cannot tolerate strong sunlight. The scorching sun of midsummer often severely burns their young leaves, causing the young leaves to curl, turn yellow, and wither, or the leaves to scorch, seriously affecting plant growth. Certain pathogenic fungi then seize the opportunity to invade, further causing infectious diseases, and now fungal fruiting bodies can be seen on some of the lesions. Rhododendron is a semi-shade-loving plant, and the cause of its leaf scorch is similar to the above. Young leaves are more severely affected, and this disease causes a large amount of abnormal leaf drop in the plants. Control methods: (1) Because midsummer often brings sudden, relatively strong wind and rain,
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Introduction to Rhododendron scopulorum and Its Planting and Care Methods
Family and genus: Ericaceae, Rhododendron. Morphological characteristics: evergreen shrub. Height l-4m. Leaves obovate to oblanceolate, with small scales on the underside. 3 flowers terminal, corolla white with pink, about 4.5cm long. Flowering period April-May. Prefers warm and humid conditions, likes light, slightly tolerant of poor soil. A plant endemic to Tibet. Produced in the Yarlung Zangbo River gorge, growing only in scrub at the forest edge on mountain slopes at an altitude of about 2000m.
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Producing Rhododendrons for Landscaping: Topiary Is the Direction, Don't Use Wild-Collected Rootstock
Regarding the phenomenon of some nursery growers using wild rhododendrons as rootstock to cultivate topiary rhododendrons for landscaping projects, Li Yong, secretary-general of the Rhododendron Branch of the China Flower Association, recently stated: topiary is currently an effective way to increase the added value of landscaping rhododendrons, but the practice of using wild-collected rootstock for grafting is not advocated. It is understood that although there are not many nurseries in China mainly growing rhododendrons for landscaping projects, many places in the south have already achieved year-round supply. Therefore, in the absence of disasters, the domestic supply of landscaping rhododendrons is currently basically saturated
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Morphological Characteristics and Cultivation Guide of Rhododendron morii
Morphological Characteristics Rhododendron morii is a perennial woody plant that can reach a height of 10 m. Its leaves are elliptic-lanceolate, with margins slightly recurved, and white down on the underside. The flowering period is from April to June. The flowers are large, pinkish white to pale red, with glandular hairs, and a funnel-shaped corolla 3-4 cm long. It is monoecious, with ten stamens, and coarse hairs at the base of the ovary. The fruit is a cylindrical capsule. Rhododendron morii is distributed at high altitudes in Taiwan, China, and is most commonly seen at elevations of 2,000-3,000 m. Its twin, Rhododendron pseudochrysanthum, is distributed at even higher elevations. Flowers
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Characteristics of Rhododendron sparsiflorum and an Introduction to Its Planting and Care Methods
Family and genus: Ericaceae, Rhododendron genus. Morphological characteristics: An evergreen small shrub. It can reach a height of 1.6 m. The leaves are elliptical or oblong, with pale yellow, straw-colored, or nearly colorless scales. The inflorescence has 1-3 (5) flowers; the flowers are pale purplish red. The flowering period is from May to August. It prefers cool and moist conditions and acidic, fertile soil, and is slightly shade-tolerant. It is a plant endemic to Tibet. It is distributed in southeastern Tibet, mostly growing under mixed coniferous and broad-leaved forests or dark coniferous forests and at forest edges at an altitude of 3000-3600 m. The flower color of this species varies, including pink, magenta, pale purplish red, and white.
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What plant is the Mao Azalea? Let us introduce you to Rhododendron pulchrum
Scientific name: Rhododendron pulchrum. Common name: Rhododendron pulchrum. Family and genus: Ericaceae, Rhododendron genus. Main characteristics: evergreen shrub, up to 2 m tall, sparsely branched, young branches densely covered with light brown flat appressed hairs. Leaves papery, dimorphic, elliptical to elliptically lanceolate or oblong-obovate-lanceolate, 2.5-5.6 cm long, 8-18 mm wide, apex acute, with a mucronate tip, base cuneate, initially with scattered yellow sparse appressed hairs, later nearly glabrous above; petiole 4-6 mm long, with the same
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Detailed Explanation of Key Techniques for Alpine Rhododendron Cultivation and Management
When the seedlings you purchased arrive at the greenhouse, they are usually quite fragile and prone to damage during transport, so careful handling by the grower is very important. Strengthen management from the very beginning, and many problems later on can be avoided. 1. First potting: If you purchased plug seedlings, it is best to use rigid plastic pots 8-10 cm in size. Do not press the substrate in the pot too firmly, so as to allow aeration, and maintain a certain level of moisture. Do not prune at potting time; wait until the root system is well developed and the terminal buds begin to grow before pruning.
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How to grow alpine rhododendrons? A detailed guide to cultivation and management techniques
Alpine rhododendrons have very strong adaptability and can grow at normal temperatures. In Europe, they are mostly produced outdoors, and where conditions allow, greenhouses can be used for production. At different temperatures, the growth of alpine rhododendrons varies considerably. The optimum temperature for alpine rhododendrons is 15-20°C. At a maximum temperature of 35-39°C, growth is inhibited, and measures such as shading, cooling and ventilation should be taken promptly. The temperature is best kept within 30°C. When it exceeds 35°C, alpine rhododendrons will suffer damage to varying degrees, which is unfavorable for flower bud differentiation. Although alpine rhododendrons can generally tolerate low temperatures of -20°C, the temperature should be kept above 10°C as far as possible, especially to protect seedlings from freezing.
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What are alpine rhododendrons, Rhododendron hybridum, and foreign rhododendrons?
Scientific name: Rhododendronhybridum. Aliases: Rhododendron hybridum, foreign rhododendron. Family and genus: Ericaceae, Rhododendron. Morphological characteristics: The alpine wintergreen is an evergreen shrub, about 20 cm tall, growing on mid- to high-altitude mountains. The leaves are oblanceolate, smooth on the surface, with serrated edges, and alternate. The stems are red, erect or growing along the ground. The leaves are clustered at the branch tips, hairless on the leaf surface, with dense reddish-yellow woolly hairs on the underside. The flowers are terminal, in racemose umbellate inflorescences.
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Rhododendron 'Shinan' is a new variety of rhododendron.
Rhododendron 'Shinan', also known as tree-type rhododendron, alpine rhododendron, or foreign rhododendron, is one of the high-end potted flowers that have become quite popular in recent years. This variety was introduced from the Netherlands, Belgium, and other countries. Compared with common rhododendron varieties such as spring rhododendrons, summer rhododendrons, and Western rhododendrons, its flowers are large and densely clustered, looking like a big ball of flowers when in full bloom and giving a feeling of abundant blossoms. It is suitable for large and medium-sized potted cultivation and for decorating halls, restaurants, hotels, and other places with a magnificent effect. Rhododendron 'Shinan' is a perennial evergreen shrub or small tree of the genus Rhododendron in the family Ericaceae. The plant is much branched, with a full crown
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