In this sentence, "They could go between the plants" could mean different things depending on the context:
1. Movement: If "they" refers to people or animals, it likely means "they could move or pass between the plants."
* Example: The children could go between the plants in the garden.
2. Placement: If "they" refers to objects, it could mean "they could be placed or positioned between the plants."
* Example: Small decorations could go between the plants to make the garden look nicer.
So yes, if you're talking about objects, it can mean "they could be placed between the plants." Let me know if you'd like more clarification!