Your daughter-in-law may also be implementing hugelkultur (who-gul-cul-tour), by some definitions an Old World technique of making mounds of logs and sticks (that will eventually decay) and covering with organic matter, including compost, aged manure, and the like. Then, and for years, planting in it. Learn more here: www.almanac.com/news/gardening/gardening-advice/what-hugelkultur-ultimate-raised-bed
Your daughter-in-law may also be implementing hugelkultur (who-gul-cul-tour), by some definitions an Old World technique of making mounds of logs and sticks (that will eventually decay) and covering with organic matter, including compost, aged manure, and the like. Then, and for years, planting in it. Learn more here: www.almanac.com/news/gardening/gardening-advice/what-hugelkultur-ultimate-raised-bed