Exposing cut or potted flowers to outdoor conditions when conditions are optimal can help growers solve many of the problems that they typically experience in conventional greenhouses.
The higher light and lower humidity levels that can be achieved from retracting the roofs will help:
increase flower development
create more vibrant red and yellow colors due to increased exposure to UV
extend shelf life due to the increased wax coatings on the leaves and stem
reduce foliar disease and insect pressure
reduce damage from shipping since stems will be stronger
Discussion with John Albers on growing calla lilies in a retractable roof house in Florida and Cana
George Lucas explains why he purchased his 10 acre Cravo retractable roof house for bedding plants