What to do if the orchid roots grow when they are unearthed
The problem of exposed roots and empty roots of orchids plagues many flower friends. These abnormalities often indicate damage to plant health. This paper systematically analyzes the causes and rejuvenation methods of orchid root system exposure through a combination of pictures and texts. Even if there is extreme circumstances where only the root system is left, plant regeneration can be achieved through scientific maintenance. 1. Causes of orchid root exposure and treatment plan 1.1 Emergency treatment of root system explosion When the orchid root system breaks through the surface of the pot soil, it often indicates that the pot has not been replaced for more than 3 years. The coiled root system will form a "root blanket effect", leading to hypoxia and rot in the central area. It is recommended to choose the spring and autumn season for pot change: use a bamboo stick to loosen the soil along the pot wall, invert it and pat the bottom of the pot to remove the plants. The diameter of the new basin should be 5-8cm larger than that of the original basin. The use of conical purple sand basins is more conducive to the growth of air roots. 1.2 Plant material improvement plan The ideal orchid plant material needs to meet the three factors of ventilation, water retention and slow release. Recommended gold ratio: pine bark (40%)+ volcanic rock (30%)+ coconut shell (20%)+ charcoal (10%). When pre-treating the plant material, it needs to be soaked in hot water at 50 ° C for 48 hours and sterilized, and dried to a semi-dry state for use. Supplementing 10% of new plant material every year can maintain substrate activity. 2. The whole process of rejuvenation of empty roots of orchids 2.1 Root evaluation criteria The surviving root system should have three characteristics: plump meat, complete crystal head at the root tip, and no wrinkles in the root skin. Maintain 3-5cm of healthy root segments during pruning and use wax seals to treat the incisions. It is recommended to soak it with a 2000-fold dilution of brassinolide for 30 minutes to activate root primal cells. 2.2 Key points for post-illness maintenance During the rejuvenation stage, a high-humidity and low-light environment needs to be created: the air humidity is maintained at 70%-80%, and the illumination is controlled at 5000-8000Lux. Use the potted method for maintenance, place moist moss on the outer basin, and keep the plant material moist on the inner basin. Spraying 0.1% potassium dihydrogen phosphate on the leaves every week, and new buds can germinate for 3 months.
By regularly observing the state of the root system and adjusting maintenance strategies in a timely manner, even severely damaged orchid roots can be revitalized. It is recommended to check the PH value of the plant material every quarter (preferably 5.5-6.5) and cooperate with aerial root guidance technology to effectively prevent the recurrence of root problems.