end to end not so good. However. the old post and beam guys had ways to attach two shorter beams into a longer one using a variety of joints, depending on whether the beam was vertical or horizontal, weight bearing or not. They involved some tricky angled tennons and mortises, but certainly doable for a plant stand. I had a book on post and beam construction methods and where and when to use certain joints. Sadly the book was lost in the same fire as my workshop a couple years ago. I remember thinking it would be strange to link to vertical pieces in a weight bearing mode, but it was done.