Posted: 11/06/2017 at 13:08
That's it ... you've got it
I grow my tomatoes outside and I never water until the leaves show signs of flagging, then I give them a good soak ... sometimes I only water once a week ... this helps avoid Blossom End Rot.
However, I'm at home all day so I can keep an eye on them ... you might not want to leave them until they're that dry if you have to go out to work in the daytime, especially as yours are in a greenhouse where the temperatures will be higher. However I wouldn't water unless the surface of the compost feels dry.
Last edited: 11 June 2017 13:11:49