Tripods for bonsai photography
Use a tripod that is rated capable of holding the weight of your camera and the biggest lense you intend to use for bonsai photography and any other attachments you may attach to it. As a guide never leave your camera on the tripod unattended, especially when walking around moving reflectors and plants.
Landscape orientation (horizontal rectangle through the viewfinder)
Using the camera to take a landscape orientation of the image is pretty straightforward as the weight is mainly going through the camera body down onto the tripod, if the lense is not too large.
Portrait orientation (vertical rectangle through the viewfinder)
Using the camera to take a portrait orientation requires a slightly more sturdy tripod as the weight is not as evenly distributed, quite often the camera is off to one side of the centre of the tripod.
Tripods with ball heads
Allow movement in many directions with at least one locking mechanism.
Video versus camera tripods
Video tripods tend to have a smoother action on the pan and tilt and have a larger arm to enable
If you are constantly moving your tripod around, you can actually get a dolly with locking wheels that the tripod sits on for those finer adjustments, you just roll your tripod.