Keep a level in your hand, and set each post deep enough in the ground—at least a third of its length. Use cross‑braces between posts so they share the load, and if you’re in a windy spot, add a guy wire or a back‑post to hold things straight. Once the frame’s solid, the tomatoes will grow straight. And remember, a steady base is the first step to keeping everything else steady.

A good trick is to dig a hole about three times the width of the post, put a handful of gravel or crushed stone at the bottom for drainage, then drop the post. While it’s still upright, pour a cup of concrete around it and let it set for a few hours. If the soil is very loose, you can drive a short metal rod a few inches into the ground next to the post and tap it into place before pouring. That way the post is locked deep and won’t shift when the rain comes. Remember, a solid anchor is the shield that keeps your garden upright.