Deep Rootrainers are the workhorse of the range - suitable for propagating and cultivating nearly all plants, trees, shrubs, herbaceous, fruit and vegetables; especially those that have deep fast growing roots such as sweet peas and beans. Here are just a few examples of the many plants that can be grown with Deep Rootrainers Vegetables e.g. Broad Beans, Runner Beans, French Beans, Beetroot Herbaceous Plants e.g. Sweet Peas, Delphiniums, Sweet Williams, Wallflower Each pack contains: 1 holding tray, 8 books and a clear propagating lid. Rootrainers encourage vigorous, strong root formation; roots grow straight, avoiding root balls and pot bound plants. Opening the Rootrainer up in a book-like fashion allows for easy inspection of moisture levels and root progress, as well as satisfyingly easy removal of the young plants. Cell depth 12cm (5\') Tray Size Length 36cm (15\') Width 22cm (9\') Depth 9cm (3.5\'). Helpful hint: Protect your seedlings from mice by surrounding the Rootrainers with holly leaves.