120 days. Through the introduction of chicken seedlings by the wholesaler of green-footed hemp chicken seedlings, it is known that green-footed hemp chicken 10 kg can grow to10 kg in 20 days, which is operated in good faith and the quality is guaranteed. Green-footed chicken is a very large kind of national chicken, characterized by green feet, which can be divided into two types: hemp chicken and yellow chicken, with hemp chicken as the main one.