Cultivation Techniques of San Weikui

**Scientific Name:** Chrysalidocarpus lutescens **Family:** Arecaceae (Palm family) **Common Name:** Yellow Palm or Yellow Coconut **Native Habitat:** This plant is originally from Madagascar and parts of Africa. It thrives in warm, humid climates and is often cultivated as an ornamental species in tropical and subtropical regions. **Morphological Characteristics:** Chrysalidocarpus lutescens is an evergreen shrub or small tree that can grow between 3 to 8 meters tall. It has a clustered growth habit, with the base often thickened. The stems are smooth, yellow-green in color, and feature visible leaf scars resembling bamboo. The leaves are pinnate, long, and slender, with slightly curved petioles. Each leaflet is linear or lance-shaped, measuring approximately 30 cm in length and 1 to 2 cm in width. The fruit is dark purple or black. A closely related ornamental variety, *C. cabadae*, grows up to 10 meters tall, with slender, slightly swollen bases and bright green, alternate leaves. Its fruits are small and red. **Growth Habits:** This palm prefers warm, humid environments and partial shade. It is sensitive to cold temperatures and direct sunlight, which can scorch its leaves. While it can tolerate a range of soils, it performs best in loose, well-draining soil rich in organic matter. **Cultivation and Care:** Chrysalidocarpus lutescens should be placed in a location with filtered light, especially during spring, summer, and autumn. Provide about 50% shade to protect it from intense sun. The ideal growing temperature is 20–25°C during the day, with nighttime temperatures not dropping below 15°C in winter. Prolonged exposure to temperatures below 5°C can cause frost damage and even kill the plant. During the growing season, keep the soil consistently moist and maintain high humidity around the plant. In winter, clean the leaves regularly and mist them lightly if the air is dry. Fertilize once or twice a month during the active growing period. Soil requirements are not overly strict, but a mix of well-rotted leaf mold, peat, and 1/3 river sand or perlite works well. Add a slow-release fertilizer at the bottom of the pot. Repot every 2–3 years, removing any dead roots and trimming dense clusters to encourage healthy growth and maintain an attractive shape. **Propagation:** Propagation can be done through seeds or by division. Division is more common and effective. In spring, carefully separate plants with multiple shoots into 2–3 sections and pot them individually. Keep the temperature between 20–25°C to promote quick recovery and growth. Seed propagation involves soaking mature fruits in warm water (35°C) for two days before sowing. Germination may take time, and young plants grow slowly, but they become more vigorous as they mature. **Pests and Diseases:** Leaf spot disease is a common issue, particularly affecting the tips and edges of the leaves, causing them to dry and shrink. To control this, apply a 500-fold dilution of Kocide 101 (a copper-based fungicide). Additionally, scale insects may infest the plant. These can be managed by spraying 40% omethoate EC diluted 1500 times. Regular inspection and early treatment are essential for maintaining plant health.

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