Nothing bad is going to happen if the bottom surface of the leaf is twisted up. It just looks off, that's all.
I want to clarify that if the leaf has already matured, it's not moving, it's not going to change, and that's the way it's going to be and look for the entire life of the leaf.
Many of us are used to how a sunflower will reorient a mature leaf to the light at any given stage of it's life. This is not true for an orchid.
Same goes for leaf deformities from insufficient watering or nutrient deficiencies. Once the damage is done, it's done.
When the new leaf comes out, it will orient itself to the light source, grow according to how much water is available, and adjust it's growth to how much light is available. Once the leaf matures, that's it. No more change.
This is one of the ways an experienced grower can tell whether a Phal has been rotated or has been grown without much thought about how the plant grows, or even stuff like what infections it contracted, or what kinds of nutrient deficiencies occurred, etc. You'll see signs like leaves twisting in odd directions, or helicopter leaves (if you intended for the plant to have helicopter leaves that's a whole different story), blemishes, so on and so forth.
Last edited by King_of_orchid_growing:); 01-02-2010 at 10:34 PM..
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