Meshroom has been very fun to work with for what I can only refer to as "closed-shell" or fully convex shapes. I tried my damnedest to collect a good photogrammetry-based model of a flower, and the mesh fidelity I got from my 100 or so photos was pretty terrible... And I think probably because of the leafs and the bowl shape of the petals on top. If I had time, I probably would have separated the flower into distinct pieces (leafs, stem, top of flower) and do more assemblage in my 3D program with discretely generated meshes...

However, stones and plant bulbs came out great.

Edit: After some of the other links in this discussion, I definitely need to revisit this project! Some people have had great success with foliage and flowers it seems like.