Well, all I can say is that it seems to be something that that particular cross
does. Mine grow like little weeds (faster than dandylions) and some
occasionally get that white bleached out kind of look. I suspect it has
something to do with the rate of growth and that some nutrient (or biosynthetic
pathway) is limiting. Since they grow so fast, I presume it isn't anything to
worry about. I doubt it can be remedied.
I've seen it occasionally in other phrag crosses. This grex seems to have
a penchant for it.
> I bought a Phrag. Paul Eugene Conroy (or something like that written on the
> tag) at a plant auction. I've grown it in my ba***t under fluorescent
> lights (2-bulb fixture, one common and one grow lamp, about 6-8" above
> plants) with other phals and paph orchids. It is sending up the second leaf
> since I got it, but the leaf margins are green but most of the interior is
> white. What could be causing it and how to remedy?
Robert G. Halgren, PhD.