Phal with tissue collapse. What is wrong?

[SouthPark]

There are articles out there that discuss two significantly different temperatures. If the two temperatures are significantly different, and if the temperature changes from 1 of those temperatures to the other significantly different temperature at a 'relatively' fast rate ------ exactly how quick -- not sure. But if relatively quick, such as a warm plant brought into an air-con or cold environment, then the leaf cells can be destroyed ------ or collapse --- possibly resulting in what is seen in the pics.

They had to give names for cell busting - and one name was 'mesophyll collapse'.

Another way to get that to happen is ----- warm/hot leaves ------ and then water the leaves with cold water. We don't want to do that of course. But that's an example of the quick temperature change ----- possible results of such situation.

[JScott]

I also vote sunburn. Even if you have other phals in the same place, some can take more light than others, and if this plant was new, it wouldn't have been used to getting much light, and putting it out there with your others could lead to sunburn. When you get new plants, gradually move them into wherever you're going to keep them if that place gets lots of light. If you just stick them out there, they'll get burned.

---------- Post added at 08:49 AM ---------- Previous post was at 08:47 AM ----------

Also remember that the sun changes position in the sky through the year. A spot that might be fine for a phal in April might get way too much direct sun by July when the sun has moved higher up into the sky, so you have to pay attention to where the direct sunlight lands, and move your plants periodically through the summer to keep them from getting burned. You may not be able to leave them in the same place all year.

[SouthPark]

Originally Posted by BrassavolaStars

As an aside, I also have an otherwise healthy Phal violecea with mottled yellow leaves (older ones). Is this a problem?

Probably not a problem. Or at least not a bad news thing or life-threatening.

Permanent yellowing of leaves can occur if the light intensity gets to some high enough level.

My phal and some other orchids (a paph) got too much of a great thing, and the phal leaf has now permanently gone yellow. Very much alive, but has been yellow for several months. And one of my paphs with quite a long leaf has the same yellow throughout the whole leaf ---- alive and smooth - but permanently yellow - and has been like that for 6 months.

A pic of the yellowed leaf of phal - an 'over-sun' case. The phal is now growing in a similar spot to where it was before, but just pushed further inward - away from the most sun-intense region of the covered-balcony growing area.

I think the phal is more sun hardened now - as it still gets many hours of direct morning sun.

[Ray]

Originally Posted by Dollythehun

My hard water somehow binds up essential minerals.

Hard water doesn't directly "bind" minerals, but it can interfere with their uptake.

[Dollythehun]

I told my husband of 38 years. "I love you dearly but unless I'm going to walk in front of a car, please stop correcting everything I say. "

Your point is, as usual, well taken, Ray.

[WaterWitchin]

And meanwhile, back at the Semantics Corral...

[SouthPark]

The OK Corral is now the OKhid Corral.

Or is it the OB Corral?

[Ray]

Originally Posted by Dollythehun

I told my husband of 38 years. "I love you dearly but unless I'm going to walk in front of a car, please stop correcting everything I say. "

Hmmmm... That’s pretty much my wife’s attitude, too.

Today is our 45th anniversary. It’s a wonder we got this far.

[WaterWitchin]

Originally Posted by Ray

Hmmmm... That’s pretty much my wife’s attitude, too.

Today is our 45th anniversary. It’s a wonder we got this far.

I'll bet it is Ray... I'll bet it is.

Happy anniversary and congratulations! And thank the Lord for the process of spousal selective hearing! I've heard the longer you practice it, the better it works!

[Dollythehun]

Happy anniversary, Ray. Marriage isn't an easy process but, it (should) grows us.