Sphaeropteris cooperi is a medium-to-large fast growing tree fern, to 15 metres (49 ft) in height with a 12-inch (30 cm) thick trunk. Commonly known as the Lacy Tree Fern this tender fern makes a real statement. Supplied in a 10l pot. This fern will need protection from the UK winters until it matures. Please note that unlike the Dicksonia Antartica, this tree fern needs its roots protected so either bring indoors if possible or pot up and wrap in bubble wrap and fleece.