Agriculture as a subject for AL students has been introduced in the School in 1995. Currently Agriculture and Food Technology is taught for OL and AL, in addition with the guidance of the Principal all the students in grade 10 and 11 are provided with compulsory practical Agriculture training at school. This provides essential knowledge that is needed for the Sirimavians’ leaving the School.

In 1997, Students’ Agriculture Society (SAS) of the School was initiated and has been functioning very actively since then. It has been grown over time and now paying a major role within and out side the school related agriculture allied fields. SAS is demonstrating high-tech agricultural practices within school premises; which includes establishment and maintenance of hydroponic system in a polytunnel. There are number of plots all over the school providing examples of urban agriculture practices. They include some of the latest introductions to agriculture in Sri Lanka and traditional varieties of crops.