This technology describes utilizing rooftop water harvesting facilities to increase the availability of water for domestic use and irrigation of backyard cabbage gardens. This measure allows small-scale farmers to harvest rainwater from roofs and store it in tanks, ensuring cabbage production even during the dry season. The combination of rainwater harvesting with other good practices (e.g. mulching, manuring) helps increase productivity while reducing soil erosion, eventually strengthening the resilience of farmers to the impact of dry spells.