How to raise orchids with weak seedlings and few roots
Orchid friends often get into trouble when maintaining weak seedlings: How can orchid seedlings with sparse roots safely survive the slow stage? This paper systematically analyzes the key maintenance techniques for weak seedlings to promote roots, recommends three golden plant material formulas, and explains the operating points in detail with drawings. Precise temperature control management of the four elements of weak orchid seedlings and root promotion maintains a golden temperature band of 20-25℃, and the temperature difference between day and night is controlled at 5-8℃. A double-layered sunshade net is used in summer, and a smart temperature controller is used in winter to keep the substrate temperature>12℃. It is recommended to bury a thermometer in the plant material for real-time monitoring. Scientific light control of weak seedlings requires 8000-12000Lux scattered light, and an aluminum foil sunshade net with a shading rate of 70% can be used. It is recommended to receive morning light before 10:00 every day to avoid burning leaves with strong light at noon. Intelligent moisture management adopts the "fingertip detection method": Insert your index finger into the plant 3 cm deep and stop watering when you feel the slight moisture. It is watered thoroughly once every 12 days in spring and autumn, shortened to 8 days in summer and extended to 18 days in winter. It is recommended to use it with an electronic soil hygrometer. Chemical fertilizers are prohibited at seedling stages with weak dynamic nutrient supply, and 5g of decomposed sheep dung balls can be added every season. After the new roots grow to 5cm, spray 0.01% alginate solution every month to promote root development. Special plant material for orchids, golden formula, classic soul soil formula, pine bark (40%)+ volcanic rock (25%)+ humus soil (20%)+ perlite (15%). The activity of this combination is increased by 3 times compared with conventional plant materials. The intelligent water control formula is coconut shell (30%)+ plant gold (25%)+ bamboo charcoal (20%)+ water moss (15%)+ vermiculite (10%). The water holding time of this structure can reach 1.8 times that of ordinary plant materials. The root-promoting nutrition formula is peat soil (35%)+ bone meal (15%)+ pine needles (20%)+ ceramsite (20%)+ charcoal (10%), and the addition of 3% EM inoculant can accelerate root differentiation.
Through precise environmental control and scientifically formulated plant materials, the root system of weak seedlings can increase by 200% within 3 months. It is recommended to check the PH value of the plant material every quarter and maintain it within the optimal range of 5.5-6.5, so that weak orchid seedlings can steadily advance into strong seedlings.