The protected cultivation of herbaceous crops in mild-winter
climate locations can be an effective tool used by growers to
enhance their off-season production and to improve the quality and
quantity of the products (Hanafi and Papasolomontos, 1999).
Indeed, protected cultivation is of great significance in Jordan,
where the total area covered by greenhouses estimated to be
approximately 4117 ha in 2009 (Anonymous, 2009). Greenhouse
production is predominant in the Jordan Valley where the climate
is characterized by a warm winter. The main crops grown under
greenhouse conditions in the Jordan Valley are tomato, cucumber
and pepper,