I purchased an herb raised garden very reasonable and assembled it my self and I am a 72 year old female. It is 6 ft. Long and 2 ft. Wide. And 12 in. high. I went on line and searched raised garden beds.
Try cutting the greens into little pieces , they get tired of trying to pull big pieces. I also have a eastern Herman’s that was really tiny and seemed to work for him. He is now a Year old And weighs 160 grams.