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  1. D

    pH etc..

    In the "Soilless Mix." graphic of Naoki the phosphorus behavior is strange .. phosphorus is assorbed better with very low pH? It is the opposite then in the graphic reported by Stone. Isn't it?
  2. D

    Well Water Analysis Results - Ok for my slippers?

    Don't you think that 34 ppm of Sodium are too much?
  3. D

    brachypetalum

    Wonderful.. please tell us something about growing tips thank you
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    Macroelements/microelements must be a costant ratio?

    The largest differences are in Boron, Fe, Cu ...
  5. D

    Macroelements/microelements must be a costant ratio?

    But if I use the same commercially available complete fertilizer at 50 ppm N I underdose micros?
  6. D

    Macroelements/microelements must be a costant ratio?

    Thank you Gonewild but the problem is that on complete fertilizer label there are the micronutrients ratios but the their ppm in the final solution depend by how much fertlizer I have used.... For 100 ppm of N I have x ppm of Boron (for istance) and for 200 ppm of N I have 2X ppm of Boron ...
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    Macroelements/microelements must be a costant ratio?

    Is there something written about the range suggested for each microelement in solution? A minimum and a maximum level? Irrigation water without any fertilizer should have the same amount of microelements?
  8. D

    Macroelements/microelements must be a costant ratio?

    Dear Orchid friends, The ratio of macro and microelements in a nutrient solution must be costant? In other words a solution with 100 ppm of N must have more microelements of a solution with 60 ppm of N? Or should be better if microelements were in the same amount in both solutions? Our hobby is...
  9. D

    Of Vermicompost teas.

    OK, Thank you
  10. D

    Of Vermicompost teas.

    But I Know that EC meter is not very usefull for organic fertilizer ....
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    Sodium toxic level for orchids

    It is very interesting that there are so different opinions about Na level in irrigation water: Below 75 ppm, the best would be 0 ppm........ Perhaps a good idea is that of Myxodex ? In deciding the right level of K is important the NH4+ level anda Na level too?
  12. D

    Sodium toxic level for orchids

    Irrigation water
  13. D

    Of Vermicompost teas.

    How much compost do you use to make the tea?
  14. D

    Sodium toxic level for orchids

    I have read that for crops the toxic water level of Sodium (Na) is about 50-60 ppm. Is it tha same for orchids too? In an old article of Neptune, in "Orchids" AOS magazine, I remember that the adviced level of Na was below 10 ppm. What do you think about it? Thank you
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    Diatomaceous earth?

    I have this problem. Pill bugs are dangerous if they are a lot. I have found effective flow the pots with piretroids. The first time pill bugs come to the surface and, after 20 minutes, then I flow again. It is effective.
  16. D

    Some easy some hard!

    I like brachy very .much but they are very difficult for me. Please, give me some advices. Thank you
  17. D

    Ca and Mg again

    Cl 60,1 mg/l; SO4 61,6 mg/l; K 0,8 mg/l; Zn 12,3 microgr/l; Mn 52,2 microgr/l; Durezza 26 F°; EC 442 microSiemens/cm. My well water works diluite 1:4 in RO water or without any diluition? Na is not too hight? In the web site of St. Augustine Orchid Society I have read that Na must be lower then...
  18. D

    Ca and Mg again

    Thank you Rick. My well water (not tap water) has 68 ppm Ca, 21,9 ppm of Mg and 36,2 ppm of Na. Because I have read that Na has to be lower then 10 ppm and better lower then 5 ppm I diluite Well Water/RO water 1:4. What do you think about it? Dario
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    Ca and Mg again

    Perhaps I tend to simplify but if the problem would be that K blocks the uptake of Ca and Mg could we superate the problem giving these elements not mixed in the same time? One time NPK fert and an other day Ca/Mg fert.
  20. D

    Ca and Mg again

    NH4 is an antagonist of Ca. How do you consider Ureic N as NH4 N? Is the rate N as Nh4 / N as NO3 really Ureic N + NH4 N / NO3 N? Thank you to all.
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