Paph Season 2024

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The Orchid Inn Wössner Black Wings above was awarded an 89 point AM today, it is now WBW 'Blueberry'.

My two siblings to Hung Sheng Cape 'Bitis Botanical' AM/AOS also received 89 point AMs, 'Karen Resh' on the left is named for my wife's deceased grandmother and 'Morgan Bateman' on the right is named for a good friend of ours who passed in 2020.

Better pics will follow when we have a chance to take them.

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May I ask why the leaves of most Paphs are so yellowish? First thought is that they get too much sun/light... I can see you also illuminate with LEDs. My Paphs are also quite yellowish, I always thought it was due to the substrate/fertilizer but they are also relatively close to the light source. How much LUX do yours get, have you measured that?
Do you know what your Footcandles are for the Paphs? It could be a nutrition issue.
 
It could be a nutrition issue.
Mine are at 3,000 to 5,000 lux under an LED with 3000K and 5000K LEDs (which should give a mix of about 4500K).

I fertilize them in a week with Schwerter orchid fertilizer - according to the instructions but somehow I can't get to the ppm N when calculating (Schwerter fertilizer). In addition some limed (dolomite lime). Administered magnesium sulfate (200mg/L) and calcium nitrate (250mg/L) in the same week. This is done every two weeks. The new leaves have also become larger than the old ones and they are also firm and hard and shiny. Root growth is good. They look good so far except for that very yellow color. Xavier (Roth) always says it's due to the lack of urea. I haven't given it yet. Schwerter fertilizer contains half nitrate and ammonium but no urea.

But then, after eight months, within a month, the P. sanderianum suddenly turned greenish without warning. But I don't know why. Apparently nothing changed. 🤷‍♂️ Temps are 24°C / 75°F, rH 80%. The others still have a slightly yellowish touch.
 
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Mine are at 3,000 to 5,000 lux under an LED with 3000K and 5000K LEDs (which should give a mix of about 4500K).

I fertilize them in a week with Schwerter orchid fertilizer - according to the instructions but somehow I can't get to the ppm N when calculating (Schwerter fertilizer). In addition some limed (dolomite lime). Administered magnesium sulfate (200mg/L) and calcium nitrate (250mg/L) in the same week. This is done every two weeks. The new leaves have also become larger than the old ones and they are also firm and hard and shiny. Root growth is good. They look good so far except for that very yellow color. Xavier (Roth) always says it's due to the lack of urea. I haven't given it yet. Schwerter fertilizer contains half nitrate and ammonium but no urea.

But then, after eight months, within a month, the P. sanderianum suddenly turned greenish without warning. But I don't know why. Apparently nothing changed. 🤷‍♂️ Temps are 24°C / 75°F, rH 80%. The others still have a slightly yellowish touch.
I thought Xavier (Roth) said that the leaves were yellow because of potassium deficiency.
 
The Orchid Inn Wössner Black Wings above was awarded an 89 point AM today, it is now WBW 'Blueberry'.

My two siblings to Hung Sheng Cape 'Bitis Botanical' AM/AOS also received 89 point AMs, 'Karen Resh' on the left is named for my wife's deceased grandmother and 'Morgan Bateman' on the right is named for a good friend of ours who passed in 2020.

Better pics will follow when we have a chance to take them.

View attachment 46113
89s!!!! So close!
 
Mine are at 3,000 to 5,000 lux under an LED with 3000K and 5000K LEDs (which should give a mix of about 4500K).

I fertilize them in a week with Schwerter orchid fertilizer - according to the instructions but somehow I can't get to the ppm N when calculating (Schwerter fertilizer). In addition some limed (dolomite lime). Administered magnesium sulfate (200mg/L) and calcium nitrate (250mg/L) in the same week. This is done every two weeks. The new leaves have also become larger than the old ones and they are also firm and hard and shiny. Root growth is good. They look good so far except for that very yellow color. Xavier (Roth) always says it's due to the lack of urea. I haven't given it yet. Schwerter fertilizer contains half nitrate and ammonium but no urea.

But then, after eight months, within a month, the P. sanderianum suddenly turned greenish without warning. But I don't know why. Apparently nothing changed. 🤷‍♂️ Temps are 24°C / 75°F, rH 80%. The others still have a slightly yellowish touch.
From what I can tell your light levels appear more than fine.

Thank you for providing the link to the other thread for your fertilizer. I believe Ray is correct in stating that if you fertilize according to the instructions... the Nitrogen is a whopping 140,000 ppm. What is very strange is you say your plants look healthy except for some chlorosis.

The temps seem fine.

The sanderianum might have suddenly greened-up due to a flush of new healthy roots giving a healthier glow to the plant.

If you make a new thread showing photos of your plants and roots, perhaps everyone could give more assistance.
 
Did some cleanup work in the greenhouse and snapped a few pics while I was at it.

roths 'Legendary' x 'Tats'
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roths ('Jungle Select x 'Atlantis') x '426'
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Hung Sheng Cape 'Karen Resh' AM/AOS
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Hirohisa's Ruby 'Neil Kim' AM/AOS
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Hung Sheng Cape 'Bitis Botanical' AM/AOS
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stonei 'Flying Angel' x 'Red Dragon'
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Phrag Stairway to Heaven
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lowii
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Phrag Cape Sunset
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Wössner China Moon
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Love that stonei, you’ve got a lot of great stuff in bloom, congrats!
 
My collection is in a bit of a lull between the late winter/early spring bloomers and the late spring/early summer flowers but there are a few popping up here and there.

Ho Chi Minh
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delenatii dunkel x typical
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Another Hilo Bald Eagle that was mislabeled as a Hilo Black Eagle. The adductum/anitum dominance in the shape is neat but I'll be culling this one.

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