Posted: 26/05/2013 at 09:42
Verdun, decent soil, etc, aside, weather's really the key to a good crop. Temps from low 20sC upwards are the go. And don't pamper them. They thrive on controlled neglect.
The common fungal diseases - Early Blight, SLS, etc - don't really impact on either the quality or quantity of fruit providing sensible housekeeping is practised. Nip off the diseased leaves at the earliest opportunity, etc. With reasonale care, these common fungal problems rarely kill a plant.
Cripes, Bf, you've got a forest there! They look desperately in need of sun, too. You'd be hard pressed to dig holes deep enough to bury them down to the canopies. I'd aim for burying down to half way. Nip off the wee branches with sharp scissors, dig deeply and plant.