Phrag andreettae leaf bronzing

Discussion in 'Slipper Orchid Culture' started by MorandiWine, Mar 25, 2014.

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  1. Mar 25, 2014 #1

    MorandiWine

    MorandiWine

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    I recently purchased several andreettae from Peruflora and noticed that most of them seem to have some bronze coloration on the margins of the leaves. I will take pictures tomorrow and post them. Just curious if anyone else has had the same experience.
    BTW they seem to be growing really well, all plants with new leaves and new growths poking through.

    Thanks

    Tyler
     
  2. Mar 25, 2014 #2

    NYEric

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  3. Mar 25, 2014 #3

    MorandiWine

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    Here are the pictures as promised.

    So there is not any rot at all, and like I said the plants are growing really fast since I purchased them. I keep them in a moderate light area with other Phrags mostly besseae and some Parvi's. Temps are 55-80 right now with good humidity. Potted in NZSM, Hydroton, chunk carbon, and a touch a leaf humus. Watered twice a week and fertilized once a week with MSU, Humic Acid and Kelp extract. That fert combo has served me quite well and growth has been explosive on pretty much every plant I grow.

    Thoughts?

    Tyler
     

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  4. Mar 25, 2014 #4

    NYEric

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    Over-exposure?
     
  5. Mar 25, 2014 #5

    MorandiWine

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    Could be, but wouldnt the besseae show stress?


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  6. Mar 25, 2014 #6

    NYEric

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    IDK. Ask Kyle or Eteson, who have much more experience with them. :)
     
  7. Mar 25, 2014 #7

    Kyle

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    I've never seen anything like that. Could be light. If found andreettea to be relatively easy to grow.

    Kyle
     
  8. Mar 25, 2014 #8

    MorandiWine

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    I guess I will put half in less light and see what happens. Yes, so far andreettae seems to be very easy to grow. Hopefully some of these are decent to use for breeding.

    Thanks

    Tyler


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  9. Mar 25, 2014 #9

    Rick

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    At what strength are you fertilizing and what is the TDS of your regular irrigation water?


    May want to run a lower fert rate for these little guys. Can you measure pot TDS?
     
  10. Mar 25, 2014 #10

    MorandiWine

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    Tds from RO is 1


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  11. Mar 25, 2014 #11

    dodidoki

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    Maybe overhydration....affected species are bessae, fischerii , schlimii and andreetae. Be very careful with waterings, they need very strong air movement just on day of- and day after watering. In opposite case you will see that few or more oily spots appear on leaves , they will turn to bronze like dry spots within few days. Cause is overhydration, intracellular oedema, if it is severe, leads to death of cells ( dry spots), if only mild, spots will diappear.
     
  12. Mar 25, 2014 #12

    MorandiWine

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    The fert concentrations are:
    MSU - 3/4tsp per 2 gallons
    Humic Acid - 5ml per 1 gallon
    Kelp - 5ml per 2 gallons

    Interesting about the overhydration! Have not really thought of that since all reports that I have encountered is that the care is similar to besseae just slightly warmer. They DO dry out very slightly between waterings, not to the point of complete dryness but mostly dry. The air flow is quite high being a big believer in high flow. The bronzing to me is less spotting but more like a hazing of the leaves. Surprisingly there has not been any dry tips other than the ones that they arrived with from Peru, all the new growth has been clean of any dry tips or dry patches.

    Thanks again for the help and suggestions.

    Tyler
     
  13. Mar 26, 2014 #13

    Rick

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    Looks to me like a bit of anthocyanin production. Which could be a lot of different factors from dehydration to imbalance of P or Mg.

    Do you have fischeri? How are they doing in comparison?

    You may have some interesting pot dynamics going on. I wouldn't add any more chemical to the mix, but dilute more.
     
  14. Mar 26, 2014 #14

    MorandiWine

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    No fischeri at the moment. I did and sold them off to look for better clones. They did this a little bit, but not as much as this.

    Tyler


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  15. Mar 26, 2014 #15

    Rick

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    Have you been keeping track of the PK thread?

    Rains every day in the winter and almost every day in the summer.

    Besseae growing at the bottom of wet seeps.

    These guys need lots of water. Low TDS. The straight RO water use probably doesn't help much to get excess K out of the substrate. If you add in a bit of tap water to your RO water that would help.
     
  16. Mar 26, 2014 #16

    eteson

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    IMO bronzing is caused by low temperatures. andreettae is a warm growing species and do not grow well under 18°C. If your besseae plants are growing fine... it is too cool for andreettae. I think that temperature is the key factor growing this species. Keep them between 18 and 28°C and yo will see how start recovering. Also andreettae is highly tolerant to overfeeding and to underfeeding and you can use a wide spectrum of fertilizers with good results if you can keep temperature OK.
     
  17. Mar 26, 2014 #17

    dodidoki

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    Hello, Rick! Overhdration is a valid problem, especially on ficheriis and bessaes. You have right about raining in nature, but I read few articles before about their habitat. Writer noted that wind almost swept his hat from his head.....I know their need much water but need VERY strong air movement!!!!! I always put my fischeriis just front of fans after waterings for 2 days....last time I forgot to do this, and overhydrated spots appeared within 6 huors!!!!!! I go on your way, you know it well, I use K-lite fertilizer with weak CC on every waterings ( 60-70 ppm total).
     
  18. Mar 26, 2014 #18

    tomkalina

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    I agree with Eliseo. This leaf bronzing also occurred in our own andreettaes and fischeris when night temps fell below 60F. It is not a cool grower like besseae.
     
  19. Mar 28, 2014 #19

    Rick

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    That would be good to see if a temp increase would change that.

    55F is 5 degree F lower than I let my GH get too.

    18C is almost 65 F so that would be a significant increase to get those plants to a happier range.

    That would probably change the water uptake and transfer dynamics inside the plant as well as the media.
     
  20. Mar 28, 2014 #20

    Rick

    Rick

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    I may take the airflow in my GH for granted. After I come back inside after being in my GH, my wife says I have Einstein hair:eek: So definitely pretty breezy all the time in my GH.
     

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