In Malawi, agriculture remains very important to the economy as it contributes more than one-third to the gross domestic product (GDP), over 90% of export earnings, employs almost half of those in paid employment, and supports at least 81% of the population [13]. As a result of being an agro-based economy, agriculture is therefore the largest consumer of water, with about 79% of the total water withdrawn annually used for agriculture. This creates pressure to reallocate water to other competing economic sectors and highlights the need for improved agricultural water management in Malawi. Water resources need to be managed properly in Malawi due to the recurrence of the El Niño—Southern Oscillation (ENSO)—induced droughts that are causing water scarcity. Improving WP in the agriculture sector has the benefit of releasing more water to other competing sectors [14], provided the water is used efficiently. Malawi, being a very small country with a total surface area of 118 million km2, has limited options to increase its agricultural area; therefore, increasing crop productivity on existing cropped area is an important pathway to improve food and water security for supporting economic development and improving the livelihoods of the rural majority. More productive use of water could mean better nutrition for families, more income and productive employment for the rural poor. Some reasons to improve crop WP include: (a) to meet the rising demand for food and nutrition from an increasing urbanised population, in light of water scarcity; (b) to respond to pressures to reallocate water from agriculture and make it available to other competing economic sectors; (c) to contribute to poverty reduction and economic growth [5,7,15]; and (d) to adapt to climate change and variability.