The reason may be found in the porous nature of soil where every rainfall sinks underground where it falls without surface flow or water current. It may also be due to the tremendous speed with which the plants cover up any bare area of the soil surface. This is due to the excellent plant growth conditions of soil, water and temperature prevalent in the area.

The topography and the geography of an area always have a tremendous influence on the vegetation of any area. The Naga Country lies in the temperate zone and is mountainous. But, its mountains are not craggy, awesome and precipitous as in the Himalayas. The mountains of the Naga Country have a forthright, inviting and lovely look, covered with every green vegetation and full of life.

The mountains ranges of Naga Country run in a general north-south direction and rise, range, from west to east with the highest ranges, the Patkoi Mountain Ranges forming a natural boundary between India and Burma. The highest non-Himalayan peak of the Indian sub-continent Saramati (3840/12,598 ft) - is in this ranges. As the mountain ranges run in a north to south direction, but the rivers of Naga Country flow either from east to west into the Brahmaputra in India or from west to east into the chindwin in Burma. The Naga Country straddles the vast land between these two great river systems into which all its rivers pour their waters. the greater part of the land that drains itself into the chindwin in the east lies in Burma and the smaller, western part that drains into the Brahmaputra lies in India.

Rainfall in Nagaland is not only heavy but also wide spread over many months of the year. An average 2000m (80 inches) of rainfall is obtained in about 8 months of the year, though the period from the middle of June to mid -September experience the heavies rainfalls. During the vegetation also receives moisture from moist clouds. In addition, the vegetation also receives moisture from moist clouds roll, through the plants on the mountain sides. Even on days when there is no rain, these moisture-laden clouds blow through the vegetation leaving them damp and green. This encourages the profuse growth of Lichens which characteristically festoon trees.

There is also winter rain at least once or twice a year. In addition, there are monsoon thunder showers accompanied by hail which may sometimes be very devastating to orchards and plantations.

During the winter, heavy frost is found in the higher reaches of the mountains.

Stormy winds are experienced during February March, and every year it is not unusual to find the roofs of houses missing after particularly stormy night. In fact, there in a saving that were it not for the leeches and the wind, the place would have been a paradise.

The Naga Country is botanically one of the riches spots in the world. It has been mentioned that Naga Land has areas with climatic conditions ranging from the Apline in the higher reaches of its mountains to moist, hot tropical conditions in the foot hills adjoining Assam Plain. As would be expected, the area has vegetational types ranging from alpine types to moist tropical types. In addition, the arrangement of the mountain range such that it creates rain shadow areas where the conditions are dry and hot supporting even species of the desert regions.