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Originally Posted by SouthPark
It's also excellent how you're keeping records of the growing conditions there, adding to the information about how these orchids can be or should be grown, and what they can handle too. Your growing conditions look really good too rbarata.
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Investigating what a plant needs is part of the fun of this hobby, isn't it?
I like to post here my findings and growing results in a blog form so that the information can be useful to our fellow members.
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Originally Posted by Orchidtinkerer
Rbarata's plant was deficient in Magnesium for years, one can really see the progress the plant has made from stumpy red colored new growths to finally producing a sheath after Rbarata started feeding Epsom salts but there are still indications of a Magnesium deficiency to me.
It's very hard to distinguish between high light pigmentation sometimes but if the whole sheath has a purple pigmentation compared to only the top of the leaf having freckles its a good indication that there are magnesium issues. Probably a wrong PH which is most often the culprit for magnesium related issues.
Rbarata do you check the ph of your water?
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Now that the sun is lower, I am growing my tenebrosa under full sun from 10:00 to 15:00 approx. (photo below) so an increase of pigmentation is normal in the most exposed areas.
Also, its variety (rubra-photo below taken from the web) has the most red flowers I've seen in tenebrosas so, probably, higher levels of Anthocyanin might be present.
Orchidtinkerer, can you be more specific about which clues are telling you there's a Mg deficiency?
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