Introduction

Protected horticulture involves growing crops under structures that modify the natural environment to enhance growth, yield, and quality. The choice of structure depends on crop type, climatic conditions, cost, and desired level of control. It consist of the following structures:

A. On the basis of environment control

a. Naturally Ventilated Greenhouse

b. Environmental controlled green house (Artificial ventilated)

B. On the basis of technology used

a. Hi-Tech Greenhouse/ Fully environmental controlled green house

b. Semi Hi-Tech Greenhouse

c. Low tech greenhouse

C. On the basis of structure/shape

a. A lean-to-type design

b. Even-span and Uneven-span Greenhouse

c. Ridge and furrow greenhouse

d. Saw-tooth type

e. Quonset type or pipe framed greenhouse

f. Curved roof greenhouse

g. Other types: A-frame type greenhouse, Gothic arch, Geodesic dome, etc.

D. Based on construction material

a. Wooden/Bamboo greenhouse

b. Pipe-framed greenhouse

c. Truss framed greenhouse

E. Based on utility or use

a. Active heating greenhouse

b. Active cooling greenhouse

F. Other Structures

a. Glasshouse:

G. Based on soil and climate

a. Polyhouse

b. Shade House / Screen House

c. Rain Shelters / Low Tunnels

d. Shade house/Lath House

e. Net houses

f. Growing rooms:

g. The automatic greenhouse