This block consists of providing farmers with the skills and resources needed to protect their Forest Garden sites. Farmers achieve this by planting green walls – an enhanced version of a living fence that TREES has developed – around the perimeters of their sites. They then plant fast-growing fertilizer trees throughout their sites, often in alleys among their crops, to further stabilize their soils and enhance land fertility. We decide which species to grow based on which species adapt best to the agro-ecological zones where we work. We consult with the farmers themselves on what they want to grow, eat, and sell and our technicians advise farmers on the best way to plant and plant, iterating year-on-year changes that may enhance their garden, sales, and production. For example in drier climates like Senegal and Singida, Tanzania, we train farmers on growing various acacia species, which do not require much rain. We also promote nitrogen-fixing trees and crops, such as gliricidia species, acacia species, pigeon peas, and fruit trees that have a shorter maturing period (3-5) years. We also grow species based on what is culturally popular, nutritious, and marketable, like bananas, a staple food in Uganda.