These plants are conveniently supplied in a polystyrene box with 12 large cells (not plugs) making them perfect to plant in your garden now. These boxes are exactly as you would buy from the garden centre. They are posted out in a unique made for purpose cardboard box (as shown) ensuring the plants reach you in first class condition. Box dimensions 255 x 300mm A high quality of dense heads of crisp Iceberg lettuce with uniformly-shaped hearts and an excellent flavour. Once cut, each head can last for up to two weeks in the fridge.