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