Dear sri Praveen, we can grow any vegetable/exotic vegetable in open as well as gH/PH also. Only difference is quality,colour and look,which will be good in GH/PH.
Which ever is an exotic vegetable today, generally will become a vegetable in our indian markets after some time… Previously, cabbage and cauliflower also were exotic vegetables and same coli family only. Now they became our regular vegetables.
Mostly any exotic vegetable ,is mostly used by above middle and above high society people only. Generally they want a quality exotic vegetable and mostly not mind for price.
Good Quality, colour and look will come if they are grown in green house, because of control climates, and they fetch good prices. Broccoli was having very good demand with high prices, till last year, but now with not much. you can produce broccoli in open but not with good quality, colour and look and it fetches low price comparitively. Keeping quality also differs in vegetables, if grown in GH/PH and open.
Basing on the above facts, pl take a good decision. g.p.rao, farmer