Phalaenopsis leaf discoloration

[kalanchoe]

Hello All!

I'm hoping you can help me address a problem I found on one of my phals. I ordered it in February, at which point it had a small new leaf growing. Its color looked light but normal for a brand new leaf. Since then, the leaf has grown out with a mottled appearance. Other than the color defect, the leaf is firm, and I don't detect any insects on it or in the pot. It was repotted in February after I received it in the mail.

I've heard that magnesium deficiency can cause discoloration on leaves, so I plan to try watering it with an epsom salt solution, because I figure that can't hurt. What else would you do if this were your plant? I have some Physan 20 on hand if needed.

In the pics you can see the small leaf it had when I got it, and then newer photos which show the problem.

[Paphman910]

What type of lights are you growing it under! It happend to me with my Phal using T5HO and it caused these patterns of bleaching! Maybe too strong light so I raised the T5 higher (about 10 inches above the leaf) and now back to normal color.

Paphman910

[camille1585]

I've seen the same on a Phal, and I think it faded away as the leaf hardened off.

[kalanchoe]

Hi Paphman, I just grow in my windowsills! They're east facing and don't get direct sunlight; just bright light in the morning that fades throughout the day. Thanks for your input!

Camille, that's good to know! I hope this one does the same...