Cider Gum. Tree with silver blue juvenile foliage. Most popular species, greyish-silver, fragrant foliage, widely used in mixed cut flower bouquets. A magnificent tree with flaking bark in shades of grey, cream, green and brown. It has silvery-blue, rounded young leaves which give way to long, glaucous, sickle-shaped adult foliage. It is probably the most well-known gum in this country as it is often seen in the milder garden, where it is completely hardy. Full sun. Eventual height: 25m. Sold in 9cm pots.