我知道的最容易种活，又可以改良土壤的是green beans 我们今年8月第一次尝试，这会儿收了第一波。有两种： pole beans & bush beans 我们买的是后者的种子，室内育苗，然后移到外面。新手无需经验，就可以种活。要是担心种不好，明年3，4月份买苗
Some farmers grow green beans to replenish their soil because they’re nitrogen fixers, meaning the plants draw nitrogen into the ground. This eliminates the need to fertilize before planting the next crop.
https://www.gardensafe.com/tips/harvest-to-table/get-to-know-grow-green-beans.aspx
