Key cultivation techniques for double-ridge planting of grandfather-generation seedlings

★Grandfather-generation seedlings   double-ridge planting

Growing medium: coarse Chinese fir chaff 50%, coarse granular orchid stone 40%, river stone 5%, orchid mycorrhizal soil 5%;

Cultivation method: clean cultivation and moist cultivation, aluminum alloy glass orchid house, intake and exhaust fans running continuously for 8 hours (daytime 10-18), no temperature or humidity control equipment (removed N years ago).