Leaves turning yellow & brown

[Mountaineer370]

I'd like to suggest that we ask agnese84 what the growing conditions are, i.e., light, temperature, watering, etc., since they were not mentioned at all in the original post. All we have to go on are the pictures.

How long have you had this orchid and when did the issues with the leaves begin? The potting mix looks light and airy, but it's impossible to tell whether it has started to decompose or what kind of drainage the pots have, and depending on watering frequency, the roots could be either too dry or too wet. Getting this orchid out of the pot to have a look at the condition of the roots would be helpful.

Where is the orchid kept? In your home, I assume, but is it in a window that gets direct sunlight, in a dark corner that gets almost no light. or something in between? Knowing the exact lighting conditions would be helpful. Also, what are the temperatures, day and night? What is your watering method and frequency?

BTW, welcome to the Orchid Board!

[agnese84]

Thank you all for your replies.
So in addition: I have had this orchid for approximately 6 years. It has been standing / growing in its current position for over 1.5 years now. It stands on the windowsill facing SW - so gets light later in the morning till afternoon as then sun goes behind trees - like somebody mentioned - we don't have too much light during the winter month. It was in the same spot last winter and survived the winter well.
I did repot it around 1.5 months ago - in see-through pot specially for orchids with holes on the bottom and used orchid potting mix - "Westland Orchid Potting Compost Mix Enriched with Seremis". I also added few pebbles on the bottom of decorative pot so the inner pot is not sitting right on the bottom.
So I think it may have something to do with re-potting but not sure what.
I will take it out to check the roots and potting mix.

[rbarata]

a84, and what about temps and watering frequency?

[agnese84]

Temperature is around 20 degrees (room temperature) and it stays like that most of the days - unless it gets colder outside then it may drop by a degree or two but these are not drastic changes. And watering is usually once a week now.

[rbarata]

20ºC is ok

As mentioned before, maybe you should inspect the roots, although I think the problem is just light levels too high.

[Mountaineer370]

Originally Posted by rbarata

20ºC is ok

As mentioned before, maybe you should inspect the roots, although I think the problem is just light levels too high.

See, I'm really questioning if light levels are the issue, if the orchid has been in the same location, with no problem at all, for a year and a half, and the problem only started a month and a half ago, after repotting???

agnese84, you say you are watering about once a week now. How is that different from what you were doing before the repot, and what type of pot and potting material was it in before?

[camille1585]

I'd agree about the light levels being too high, especially now that we know how the plant is grown.

UK and Netherlands are at similar latitudes and I also grow my plants in a SW window, and I would not give some them that much direct sun from spring to autumn. A couple hours late in the morning has been more than enough for my Phals, and the rest of the time is bright shade. In the winter I do move them to get full advantage of the window, because like you say, there's not much sunlight in the winter!

[Dollythehun]

What is your water hardness like? My first thought is light but, close behind is a deficiency of some kind.

[SouthPark]

Definitely - providing some supplements will be highly beneficial every once in a while to avoid yellowing. That's to avoid nutrient or element deficiencies.

It may not be a case of nutrient/element deficiency, as the leaves would probably have yellowing in patches, rather than the more uniform light-yellow-green purple-fringe (too much sunlight) look.

But - definitely - check the roots right away.

[Dollythehun]

I agree SouthPark. It should be blotchy if it's a calcium/ magnesium deficiency. But, if the OP's light hasn't changed, it leaves me puzzled. It wouldn't hurt to dose with an epsom salt solution.