phalaenopsis bellina yellow leaves
 

:hello

i have a phalaenopsis bellina that i bougth from ebay last year maybe in summer months and it was doing well it even put out a new leaf but a few weeks ago the leaves started to turn yellow and i dont know why

i had it in Pinus pinaster bark that i collected myself it had a veryyyyy good air circulation but when i saw the leaves turning yellow i bought orchid mix and repot it the roots are green and healthy it had one or two dead roots that i´ve cut of besides that i cant see nothing wrong

here some pics

the small leaf was the one that grew after i got it in the mail

http://imagizer.imageshack.us/v2/800x600q90/10/32zg.jpg
http://imagizer.imageshack.us/v2/800...0/132/z7bz.jpg
http://imagizer.imageshack.us/v2/800x600q90/31/8zhh.jpg

you do not tell us what the light is like that you have it in nor how often you water it. ther are many reasons for a phal to turn yellow.

This reminds me of a lack of water issue. If it was too hot I think the top leaf would show more yellowing. As such I would guess your roots are bad or this plant isn't getting sufficient water.

What type of water and fertilizer are you using? It almost looks like some sort of deficiency.

Im thinking to much sun exposure. W possible deficiency some where....

Definitely looks like it's not receiving enough of something... i.e. what CPKidofAugusta mentioned, some sort of deficiency.

What is the light this Phal is receiving? How often are you watering it.

Literally these guys can DRY out in between waterings in my own experiences. They can take very bright light, but no direct light whatsoever past 10 am.

Fertilizer should be applied at 1/4 - 1/2 manufacturer's suggested strength regularly (3 out of 4 waterings). Upon the fourth watering when not applying any fertilizer, drench the media completely in order to leach out all remaining salts. We're talking a quart to a gallon of water (ideally water that is low in dissolved solids).

The fact that you have some healthier, green new growth is very good... typically I like to think that as long as the yellowing is occurring on the older growth and not the new growth it's nothing to be alarmed about.

---------- Post added at 08:35 PM ---------- Previous post was at 08:32 PM ----------

The slightly yellow-tinge of the newer leaf on the right (1st posted pic) indicates to me that this guy is indeed receiving too much light. You know you have the level just right when the plant produces a well-shaped, glossy and darker green leaf.

i water it the same as the other orchids when roots are white and/or when barks feels dry and give it the same fertilizer as the other orchids (its special for orchids)

as light i have it next to a vanda tessellata and a Paphiopedilum maudiae "Green" and both of them are doing well

here is schematics of the ligthing :)

http://imageshack.com/a/img585/5048/7di8.jpg

I promise, you should consider increasing your watering of this plant. Deficiency may explain it, but I think it's unlikely, and I dont think this is any kind of overexposure light. Do you have really good (low mineral) water?

The last image looks under watered. What minimum temperature is it exposed to? These are warm growers.

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i use water from my water well or from the rain

min temp maybe 18ºc to 20ºc lowest maybe 15ºc its in the kitchen