Camp Internet's Global Gardening Studies are open to all Camp Expedition Teams. RAIN's Youth Technology Corps members are Expedition Team Leaders for Communities taking part.
Norway spruce - the traditional choice and usually the cheapest.
It has fallen from favour in recent years, as it tends to shed needles quite heavily. Nevertheless, if well watered and kept away from radiators it will drop fewer needles.
Nordman fir - the most popular tree these days due to its needle-holding qualities. It has strong, straight branches clothed with thick, flat needles with a silvery underside. It tends to be expensive as it is much slower growing.
Noble fir - this attractive fir is becoming a popular Christmas tree choice for its beautiful silver-blue needles, stiff branches and durability. Scots pine - a little more unusual, but a wonderful, bushy tree, with extra long needles that do not drop as readily.
Fraser fir - a relatively recent introduction to the Christmas tree market, this has a good shape and excellent needle-holding qualities. Its foliage looks similar to the Norway spruce.
Blue spruce - this tree has a silvery blue colour to the thick needles and an aromatic, citrus scent. Be careful as the needles can be quite prickly.
Trees to plant outdoors
Don't plant Norway spruce unless you have a very large garden! It grows to about 30m (100ft) and drops needles all year. Instead, try Abies koreana - grows to 12m (40ft) therefore more suitable for the smaller garden. Abies procera - silvery-blue fragrant tips, smooth, grey bark, and good needle retention.