"S WHITE" wrote
I am looking to buy my husband a plant for Valentines Day - I wanted
something like a lemon or orange tree, can someome tell me firstly if
they actually can be grown here and if anyone knows where I might be
able to buy one - I haven't seen them in my local garden centre.

We have two Lemons, a Tahiti Lime, a Padua Lime, a Grapefruit and an Orange.
All fruit well**.
They spend the winter in our unheated but frost free garage which has a twin
walled clear plastic roof and the rest of the year outside against a S.
facing wall. They are taken in when the frost is forecast, October/November
usually and brought out again once most of the frost has gone, usually
March. Occasionally I have to put them back under cover for a few days if
frost is forecast again.
**The best ones for fruit are the Lemon and the Tahiti Lime, the latter
being a bit smaller growing and produce the Limes sold in shops.
Most GCs usually stock some citrus although they can look a bit sick IME,
the RHS Wisley shop has some most of the time and there are also specialists
like The Citrus Centre ...

http://www.citruscentre.co.uk/

Don't get carried away though, learn on a cheaper one first, a decent sized
one can be expensive.

--
Regards
Bob Hobden
W.of London. UK