Hi Kierian, I think the most likely reason they aren't doing too well is that you have planted them in March or thereabouts and in your type of climate, tomato season is finished. A general rule of thumb for planting in temperate climate is to wait until after Melbourne Cup Day, when hopefully all the frosts are gone. so now would well and truly be the right time to have another go, also don't over prune them you really only need to pinch the laterals and maybe just not so much fertiliser, a little bit of potash occasionally will improve your fruit and only water at the base of the plant ,not overhead. Hope this helps. Kind regards, Glenn

- Glenn