The potting trays we offer do a fantastic job. They are mainly used to sit on the greenhouse staging and are ideal for keeping your soil in as you pot up your seed and seedlings. This product measures at 675mm in length and 565mm in width making it an ideal size to do the job you require. The base of the product is shaped from rolled aluminium and it also features cedar sides as well. As it has a modern look and feel to it the potting trays would fit in perfectly with your greenhouse.