Drag blocks to the hotbar (bottom of screen) and assign number keys. For farming, put "Seed" in slot 1, "Block" in slot 2, and "Splicer" in slot 3.
If you are still running an older version (4.17 or earlier), you are missing out on security patches, seasonal items, and performance gains. The 4.19 update solidifies Growtopia as a PC-first game. The enhanced anti-cheat alone makes the update worthwhile, as it restores integrity to the trading economy. growtopia 4.19 pc