thanks for helping. i am in the middle of having another go and it seems to be working better this time. i used pair preselection and then aligned any remaining cameras separately.
to answer your questions though:
Did you use GPS to record your location?
no. these were taken from the ground by the way.
Do you notice the overlap rate?
i probably didn't overlap as well as i should. this garden is long and thin - about 50m long x 12m wide with some obstacles in the middle.
what would be the best way to approach photo taking in this situation?
Are the photos taken at the same focal length?
yes, all using the same 17mm lens (micro 4/3, so 2x crop factor and 34mm full frame equivalent FOV).