If you know anyone with a decent camera to take close up shots of your plant ,my uncle has got a pretty expensive camera so I'm going to cut a bit off my plant (when she's ready) and get him to take as close up shot as he can then transfer the image to my pc then enlarge it and see if it works,

I've got a 5 mp camera on my phone and if I get the focus right and enlarge it I can zoom in pretty good on my pc so his pro camera should do the job,

not an answer because I haven't tried it ,so if anyone has tried it let us know,please.