From their website:
Olive Hill Greenhouses has been located in Fallbrook, Ca since 1973. Since then Olive Hill has grown rapidly into one of the largest interior plant producers in California.
Our two production facilities total 760,000 square feet, and our modern greenhouses features include galvanized steel exterior walls, inside insulation, computer control of misting, propagation, environment, and shade curtains.
We grow our bromeliads and orchids using Reverse Osmosis for increased water quality. Most of our growing tables are rolling in order to maximize the growing area and reduce aisle space in each greenhouse, and many custom trailers and handcarts are used to move plants.