Does anyone know how to add tags to a multi-plant photo on an iPad?

It can't be done. You can't do the required "click and drag" to draw a box, that only works with a mouse action.

I wonder if this is why we have so many multi plant photos without the tags? Maybe some only have phones or Ipads?

Hmm. I also wondered about that. I find it very helpful when multi-plant photos are tagged, mainly because they then show up in the database under each plant and I can quickly see how others have used the plant in their landscape. I don't use either a phone or pad, but am wondering if somehow there could be a work-around so those folks would be able to label their photos?