By Kenneth Marcos 
Inside the high concrete walls of Caloocan City Jail, rows of green vegetables now grow under the sun. What was once an empty space has turned into small gardens, giving hope and purpose to persons deprived of liberty (PDLs) as they spend their days inside the facility.
On January 7, the Department of Environment and Natural Resources Metropolitan Environmental Office–North (DENR MEO–North) visited the Caloocan City Jail to show full support for its urban gardening and waste management programs. The facility is under the Bureau of Jail Management and Penology (BJMP) – National Capital Region.
The visit aimed to strengthen the knowledge and skills of PDLs and jail officials in urban gardening, environmental protection, and proper waste management. These activities are part of rehabilitation efforts designed to help inmates use their time productively while learning skills they can apply once they return to their communities.
During the activity, BJMP personnel showcased the vegetable gardens and trees being maintained by the PDLs inside the jail compound. Leafy vegetables like pechay, along with eggplant, tomatoes, mulberry, and various herbal plants, are now growing in containers and small plots. According to jail officials, the harvest is used as additional ingredients for meals served to the inmates, helping improve nutrition while reducing food costs.
Officials also said gardening has positive effects beyond food production. Regular planting activities help reduce stress, boredom, and tension among PDLs. It also teaches discipline, patience, and responsibility. More importantly, it builds awareness about caring for nature, even within the limited space of a detention facility.
DENR MEO–North expressed readiness to provide further assistance to sustain and expand the program. This includes the distribution of additional seedlings and the conduct of training sessions and capacity-building activities. The office is also prepared to coordinate with the Production Forest and Management Section of the Conservation and Development Division to deliver technical support when needed.
A key part of the planned support focuses on waste management education. DENR officials highlighted the importance of Republic Act No. 9003, or the Ecological Solid Waste Management Act of 2000. Training topics will include proper waste segregation, recycling, and composting. These practices aim to reduce waste inside the jail while turning biodegradable materials into useful compost for the gardens.
Waste management is a growing concern in densely populated areas, including detention centers. By teaching PDLs how to properly manage waste, officials hope to instill habits that support cleaner surroundings and protect public health. These skills can also help inmates find livelihood opportunities related to gardening or environmental work after their release.
DENR MEO–North stressed that environmental protection should involve all sectors of society, including correctional institutions. Supporting programs like this helps spread environmental awareness and encourages active participation, even in challenging settings.
For BJMP, the partnership with DENR shows how government agencies can work together to promote rehabilitation and sustainability. Jail officials noted that such programs help prepare PDLs for reintegration into society by giving them practical skills and a sense of purpose.
As urban areas continue to grow and space becomes limited, initiatives like urban gardening and proper waste management prove that small actions can make a big difference. Inside Caloocan City Jail, green spaces now stand as quiet reminders that change and growth are possible, even in the most unlikely places.
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