Rheum palmatum var tanguticum (Ornamental Rhubarb) Green Thumb Nurseries Carbon emissions make Earth greener but are also drying it out New Scientist 160,600+ Shrub Roses Stock Photos, Pictures & Royalty Free Images iStock This is called water culture, or hydroponic orchid growing. Give the plant bright light and change the water every week. Add liquid orchid fertilizer to the water while its not flowering. #orchids