Different mulching systems using paddy straw, polythene, Farm Yard Manure (FYM), paddy straw along with FYM, polythene overhead cover and FYM plus paddy straw along with polythene overhead cover were evaluated in a polyclonal seedling nursery of Hevea brasiliensis. During low temperature stress, the soil temperatures in the morning were 1.74 and 1.92°C higher under the treatments FYM + paddy straw mulching and polythene overhead cover respectively when compared to control. The combination of these two mulching systems increased the soil temperature by 1.94°C over control. Plants under polythene overhead cover showed better photosynthesis and growth. However, with removal of polythene cover and with increase in air temperature during the month of March - May, six month old seedling under both FYM + paddy straw mulching and polythene overhead cover with FYM + straw mulching attained comparable stem diameter. While 46.5 per cent seedlings attained the required stem diameter for budding under FYM + paddy straw mulching and 44 per cent under polythene overhead cover with FYM + paddy straw mulching, only 22.5 per cent seedlings attained similar diameter in control.