>>1313842Easiest way to get the water to deeper levels without having to do it super slowly and/or having it run off the sides, which happens especially if you have hard clay, is to dig in flower pots which you can quickly fill at once. In the case of tomato, it has the added bonus that this way you can minimise dirt backsplash to the leaves, which can infect them with blight.
Doing it this way with lots of my stuff, including ornamentals.
Here for example on a recently planted dwarf palm