Melbourne

Oh yeah, by not overwatering I meant more allow good drainage. Really good drainage, not having pots sitting in water. Because mine hated that and died about it

Edit: Also try not to let them dry out too much between watering because if they get super thirsty then super hydrated heirlooms are more prone to the skin splitting. I heard that.

As for how to balance those water/drainage needs your guess is as good as mine?

Maybe check them often, regular watering, stick your finger in the soil to check it’s the comfortable level of damp. Here’s a better guide https://www.thespruce.com/why-do-tomatoes-split-2540002

Also ask a Bunnings worker about the right potting mix, grab one with tomatoes on the label, or if in-ground and you have heavier more clay soil ask about additives for digging in to help drainage (like sand or micah or something).

There’s also something about epsom salts for acid loving plants but I don’t know the right way to go about that and that seems advanced.

Personally I’d just use safe bets for fertiliser like a slow release fertiliser for vegetables or Seasol according to directions. Because tomatoes are hungry bois. Or manure if it’s been rotted down.

A more experienced person might have better tips.

…Damn. I wanted to do tomatoes one day but they seem like they take a bit of maintenance? 😥