As warming of the climate gathers alarming pace posing a danger to agriculture, greenhouse cultivation is the only answer to save crops of flowers and vegetables, experts have said.

Greenhouse farming, which is cultivation of plants inside a building with glass walls and roof under controlled condition, has become necessary as temperature ideally required for flower cultivation is no longer available, not even during winter.

Floriculturists say that the ideal day and night temperatures for flower cultivation are 28 and 18 degrees celsius respectively.

However, they point out, the temperature in most parts of the country remained above this level even in the peak winter season.