Cultivation Method of Cymbidium Grandiporum 'Dapin'
As the leading among the four famous varieties of Cymbidium, Cymbidium Grandiporum 'Dapin' is deeply loved by orchid enthusiasts for its elegant荷花 petal flower shape and subtle fragrance. This ancient variety, originating from the Qianlong era of the Qing Dynasty, remains a popular choice for both beginners and veteran collectors. This article will systematically analyze its cultivation essentials and objectively evaluate the variety characteristics.
I. Setting Up the Cultivation Environment for Cymbidium Grandiporum 'Dapin'
1. Light Control Techniques
In spring and winter, it can be exposed to full sunlight, while in summer, a 50% shade net is required. It is recommended to use an east-west facing balcony to avoid direct midday sunlight. If yellow spots appear on the leaves, the shading rate should be adjusted immediately.
2. Scientific Water Management
Adopt the 'dry-wet' method: water thoroughly every 3-4 days in spring and autumn, and mist in the morning and evening in summer to increase humidity. Use a bamboo stick to insert into the potting soil to test moisture level, and water when the top 3cm is dry. Control water for 20 days during the bud formation period to improve the quality of flowering.
3. Precise Temperature Control
Maintain a low temperature of 8-12°C in winter for 45 days of vernalization, and cool down to below 28°C in summer using a water curtain. Keep the day-night temperature difference within a range of 10°C to promote nutrient accumulation.
4. Substrate Formula Optimization
Recommended ratio: pine bark (40%) + stone (30%) + volcanic rock (20%) + decomposed leaf soil (10%). Add bone meal as a base fertilizer when repotting every year to ensure a pH value of 5.5-6.5.
II. Analysis of the Characteristics of Cymbidium Grandiporum 'Dapin'
1. Core Advantages Interpretation
The flower spike can reach up to 50cm high, with 8-12 flowers per spike, and the blooming period lasts for 45 days. The annual multiplication rate of new seedlings reaches 200%, and its disease resistance is stronger than that of ordinary Cymbidium, making it particularly suitable for cultivation in the Jiangsu and Zhejiang regions.
2. Cultivation Difficulties Explanation
The humidity during the flowering period needs to be stabilized at 60-70%, as excessive humidity can cause the outer petals to curl. After flowering, the flower stem should be cut promptly, and phosphorus and potassium fertilizers should be supplemented. The rejuvenation cycle of old seedlings is longer, so it is recommended to retain only the first four generations of rhizomes.
By mastering these cultivation essentials, Cymbidium Grandiporum 'Dapin' will certainly bloom with elegant flowers every year. As a traditional famous variety, it not only has the characteristics of being easy to cultivate but also retains the style of old orchid species, serving as a living specimen connecting ancient and modern orchid cultures.