Also known as a White Fir, with soft long needles 1 to 2 in. in length and occur in rows, with strong branches. They have wonderful curving foliage, with color ranges of blue to silver-green. It’s lovely shape, citrus-like” aroma and excellent needle retention make this tree a great choice at Christmas time. Concolor Fir is the ideal choice for those people who suffer from tree related allergies.