Frank's Nursery carts a green with yellow letters like this one
Frank's Nursery Carts at Marden's in Waterville, Maine
Older carts were metal with a green handle.
(https://farm1.staticflickr.com/608/22128211332_3dc48b984a_c.jpg) (https://flic.kr/p/zHoSi3)Frank's Nursery & Crafts cart (https://flic.kr/p/zHoSi3) by Harvestman Man (https://www.flickr.com/photos/124303530@N08/), on Flickr
(https://farm1.staticflickr.com/633/21519655153_3799909db9_c.jpg) (https://flic.kr/p/yMBRK8)Frank's Nursery & Crafts cart (https://flic.kr/p/yMBRK8) by Harvestman Man (https://www.flickr.com/photos/124303530@N08/), on Flickr
(https://farm1.staticflickr.com/639/22114556256_a263ca98f9_c.jpg) (https://flic.kr/p/zGbT7G)Frank's Nursery & Crafts cart (https://flic.kr/p/zGbT7G) by Harvestman Man (https://www.flickr.com/photos/124303530@N08/), on Flickr