Hi, I'm not really a tomatoe farmer though but I could maybe say something about it because I planted them 1 time in the past and it was like someone said to you, u need to cut the suckers away so that plant can grow more higher in vertically and yes you need to tiy the plant to any support so it stands up otherwise plant cant support itself if it grows high. And dont worry to cut the suckers off it will give more energy to grow more higher. Hope you understand what I mean 😉💜 all the best and they looks amazingly grown yes 🌞🍅