I tried the Topsy-Turvy planters for the past two summers, but didn’t get anything out side of root-rot for the plants in the bottom. Lat year, I planted pepper in the top, but they were still affected by the heat and didn’t grow well.
Last year was the first time we had used them. Our open-air porch’s roof wraps around the east, north, and west sides of the house.
We hung one each of two varieties on both the east & west sides from the porch eaves; and planted 5 of each of the same two varieties in the garden.
The eastern morning sun plants produced first; the western afternoon sun plants produced the most; and each side’s single plant alone out-produced all the other 5 plants of its variety in the garden, combined. We were impressed.
We bought a couple more, plus two strawberry Topsy-Turveys, at season closeout, and will hang those, from a 4-armed garden stake. Not going to put tomatoes in the garden at all.