Quote:
Originally Posted by Orchidtinkerer
Hey Kollba,
when did you move to Thailand? I'm just thinking emigrating from Sweden to Thailand 6 months ago will have been tricky!
DirtyCoconuts grows outdoors and has just faced some of the issues you have described so maybe he can help more.
If that were an indoor grown plant I would say the purpling is just right, you want a bit of purpling, not too much. Purpling can happen from too much light but also as a result of too little Magnesium.
The shield lice can very possibly be your only issue - even causing the other yellow spots. I use a strong spray that kills practically everything so cannot recommend what you use in Thailand,
So is there any way you can test the PH and the total dissolved solids (TDS) in your well water?
If you well is leeching a lot of calcium into the well water it can cause the PH to get too alkaline. The PH should be under 6.5
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I moved here 8 years ago tomorrow 1st Dec, and the shade house is about 6 years old but it was my wife who had plants in it from the start. Evetually I thought it looked like crap because she has far too many plants to care about in our garden, so she did not have time for her orchids and other plants that want some shade. So I started by making 600 concrete tiles and laying a floor there and then I replaced all shade nets. I took all her orchids, got some from her mother, split some of them in two and then starting to buy all orchids I could find in the plant shops here. That started 6 months ago when I was finished with the floor, but the rainy season kicked my ass and taught me a lesson.
And... Thailands borders has been completely closed due to Covid-19 between March and October so there is no way I could have moved here 6 months ago :-)
I will check out Dirty Coconut.
About the lice and purple orchids, see the my answer to estación seca above. One problem with living here is that it is hard to find the right products for gardening since I live far away from the tourist places where most western people stay. I hate tourist places because I lived most of my life in one of those.
I have checked PH for my water with test papers and it is about 7. If I only had a few orchids I could probably test to lower the PH with a little vinegar or some other acid in the water, but there is no way I can handle the watering 1-2 times a day without using a water hose.
---------- Post added at 01:32 PM ---------- Previous post was at 01:26 PM ----------
Quote:
Originally Posted by SouthPark
Kollba ------ a heap of us here on the forum recommend to not use hydrogen peroxide on roots ----- as that substance can either cause a long-time growth setback for the orchid, or it can even kill the root hairs (and roots).
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Yep. I have understood that now after reading some threads here. Yesterday I was recommended to dilute the H2O2 to 0.5% when disinfecting roots. I don't know what else to use because I think 70% alcohol will damage the roots even more than 3% H2O2 even if it is ok to use on leaves and stem ?
---------- Post added at 01:34 PM ---------- Previous post was at 01:32 PM ----------
Quote:
Originally Posted by estación seca
70% alcohol doesn't damage orchid plants when sprayed. I use it for insect and mite pests.
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Thx
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