[samnorfolk]

Can anyone let me know what im supposed to do when growing tomatoes, someone said that i should nip a bit out of the plant sometime..cant remember when or what it was

[mumofstig]

This is a helpful video for pruning tomatoes
http://www.videojug.com/film/how-to-prune-tomatoes

although I pinch out side shoots as soon as I see them growing, rather than wait til they're quite big 

[DD.]

I wait until they're about 6" long.

Then I can have more plants by rooting them! 

[JayG]

Tomatoes are either bush type (determinate) or cordon (indeterminate) - bush types are not normally pinched out but may need "stopping" if they are a bit late and therefore at risk of producing too many fruit to ripen before the cold gets to them.

(Most tomatoes are cordons but it's worth knowing for sure so you treat yours appropriately.)

[ally]

I wait until they're about 6" long.

Then I can have more plants by rooting them! 

Really ... I have learnt so much today!!

[GrannieAnnie]

I do that occasionally.  The side shoots root really easily usually.  So if a plant dies on you and you need to fill the gap.......