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  #1  
Old 02-25-2020, 10:48 AM
AnitadeWaard AnitadeWaard is offline
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Yellowing Leaf of Mottled Leaf Paph Female
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Hi my Paph Hung Sheng Bay is showing a yellowing leaf on a second stem: any suggestions? Water/fertilize more/less/differently...? Thanks!
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Old 02-25-2020, 11:59 AM
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Is the yellowing leaf the lowest on a previously bloomed growth? If so, it's normal for these leaves to wither and die. By the way, the plant is sitting very high in the mix which could be a sign that it has been a while since it has been repotted. What sort of condition is the mix in?
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Old 02-25-2020, 12:35 PM
AnitadeWaard AnitadeWaard is offline
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Hi thanks! No the yellowing leaf is a new growth. Medium might be a bit compacted but I've been loathe to report a flowering plant. Should I do so, or perhaps just add some medium on top?
After Googling a bit I was wondering if it's a question of too much light?
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Old 02-25-2020, 01:39 PM
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Before anyone can logically tell you what to change, we need to know what you've been doing.
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Old 02-25-2020, 01:53 PM
AnitadeWaard AnitadeWaard is offline
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Not sure if I understand the question, Ray, what exactly do you want me to tell you? Paph is sitting on East-facing windowsill, keeping it moderately moist, humidity is 50-60%, fertilizing once a week. Reading around, I think I should try less light?
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Old 02-25-2020, 02:04 PM
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And what about temps?
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Old 02-25-2020, 02:29 PM
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Thanks! Vary between about 55 (at night) - 70 degrees (during the day). Is that ok?
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Old 02-25-2020, 03:32 PM
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Assuming you're not overfeeding, that all sounds pretty good.

It may be nothing to be concerned about, but to be safe, could water have gotten trapped in the leaf axil?
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Old 02-25-2020, 06:32 PM
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Quote:
Originally Posted by AnitadeWaard View Post
Hi my Paph Hung Sheng Bay is showing a yellowing leaf on a second stem: any suggestions? Water/fertilize more/less/differently...? Thanks!
Ensure pot is good drainage. Don't allow the pot to sit in any water collected by the dish. This usually means - put the inner pot on some kind of stand that doesn't allow the drainage holes to be blocked by surfaces and/or water.

Maintain some air-movement around the plant. Maintain recommended growing temperature. Avoid saturation of media with water.

As for lighting level. It probably isn't due to too much light, otherwise that would have impacted other leaves too.

Last edited by SouthPark; 02-25-2020 at 06:35 PM..
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Old 02-26-2020, 05:48 PM
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Quote:
Originally Posted by AnitadeWaard View Post
Not sure if I understand the question, Ray, what exactly do you want me to tell you? Paph is sitting on East-facing windowsill, keeping it moderately moist, humidity is 50-60%, fertilizing once a week. Reading around, I think I should try less light?
A lot of problems will present as the same symptoms so it is very hard even for an expert to identify a problem based on a picture alone. Some will even go so far as to say it is physically impossible although some things can be seen from a picture.

An easier way and more accurate way is to find out what conditions you have been giving your plant and whichever is not right is usually the culprit.

Which is why Ray wants to know the day time temps, the minimum night time temp it receives, the humidity it is kept at, the ph of your water and what kind of light, artificial or natural and how much, south facing, west facing etc. Those will be the most likely factors affecting growth.

You say you feed once a week and like I already pointed out it is hard to identify a problem based on a picture, certain things can be ruled out though, like overfertilizing. That would create necrosis on the leaf edges which you haven't got.

One thing it could be is a deficiency of a micro nutrient. That is very hard to identify but changing to a better nutrient would resolve that so you better say what nutrient you are using too.

Whenever any plant has a problem the first thing to do though in my opinion is inspect the roots thoroughly even if that means disrupting them by 'repotting' - better safe than sorry.
You don't want any brown, soggy, mushy or smelly roots.

To me personally it looks like a deficiency but again like I have said it has been pointed out numerous times that it is physically impossible to tell just by looking at a pictures so your best bet is to use a fan - consensus on this forum is that sorts out all plant problems.

I have posted before that the wrong PH of your feeding water can lock out nutrients and look identical to a nutrient deficiency which is why I am suspecting this is the most likely case based on the discolouration on the underside of your leaves since plain rain water would not even cause that much deficiency if it is a deficiency but tap water and the wrong ph can - but since my assumption is based on looking at a picture, make sure you listen to Ray's advice after he analyses your answers before you listen to any of my novice advice.

So lastly, what is the ph of your feeding water? Tap water or rain water.

Last edited by Brian1212; 02-26-2020 at 06:23 PM..
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