Shop Orchid Care OrchidTalk Orchid Forum Weather Station Links Nursery

Welcome to OrchidTalk Orchid Forums


The Friendliest Orchid Community on the Internet!


  •  » Learn to Repot your Orchids
  •  » Learn Orchid Care Tips and Secrets
  •  » Find the perfect Orchid for your Growing Environment
  •  » Chat with Orchid Growing Professionals

OrchidTalk - "Bringing People Together to Grow Orchids Better!"


Let us help you grow your Orchids better; Join our community today.


YES! I want to register an account for free right now!


Register or Login now to remove this advertisement.

Page 2 of 3 FirstFirst 123 LastLast
Results 11 to 20 of 29
Like Tree3Likes

Benifits to using rain water?

This is a discussion on Benifits to using rain water? within the General Orchid Culture forums, part of the Orchid Culture category; The town where I live in central Iowa sent a water quality report out to ...

Click here to increase the font size Click here to reduce the font size
  1. #11
    cindiras's Avatar
    cindiras is offline Senior Member
    Real Name
    Cindi
    My Grow Area
    Under Lights
    Favorite Orchid(s)
    Catts
    Join Date
    Nov 2007
    Location
    Central Iowa
    Posts
    1,766
    Member's Country Flag
    Recipes
    2

    Default

    The town where I live in central Iowa sent a water quality report out to customers this past week, for the year 2010. Our source of water is groundwater, our groundwater is from the South Skunk alluvial aquifer. It contains: lead at level 4 (not in violation. of what I don't know)source household plumbing corrosion. Chlorine in parts per million-1.4 -water additive to control microbes. Copper ppm .06 - corrosion of household plumbing. Flouride ppm .82 -discharge from fertilizer and aluminum factories. Barium ppm .21 -Erosion of natural deposits. Haloacetic Acids (HAA5) parts per billion 7 - byproducts of drinking water disinfection. Sodium ppm 22 -Added to water during treatment process. Trihalomethanes ppb 74 By product of drinking water disinfection. Nitrate ppm .01 - run off from fertilizer use, leaching from septic tanks, sewage.
    Haaving read that, I am not too sure I want to drink anything coming out of the tap!

  2. #12
    TwoStems's Avatar
    TwoStems is offline Senior Member
    Real Name
    Ali
    My Grow Area
    Under Lights
    Favorite Orchid(s)
    the weird ones
    Join Date
    Apr 2011
    Gender
    Female
    Location
    Northeastern CT
    Posts
    961
    Member's Country Flag

    Default

    Is RO water the same as filtered water, as with a Brita (carbon) filter or something similar?

  3. #13
    Kmac's Avatar
    Kmac is offline Senior Member
    Real Name
    Kathi
    My Grow Area
    Porch/Patio.
    Favorite Orchid(s)
    How can I pick just one???
    Join Date
    Jul 2010
    Gender
    Female
    Location
    Dallas, TX
    Posts
    2,515
    Member's Country Flag

    Default

    I installed a rain barrel a while back and always use rainwater always for fertilizing (although no one had explained why as well as Geoff, they had told me that was really important), always for the picker orchids, and when abundant for everyday watering as well.

  4. #14
    orchidlady's Avatar
    orchidlady is offline Senior Member
    Real Name
    Susan
    My Grow Area
    Under Lights
    Favorite Orchid(s)
    Phal and Paph species
    Join Date
    Apr 2009
    Location
    Seattle, WA
    Posts
    904

    Default

    Quote Originally Posted by TwoStems View Post
    Is RO water the same as filtered water, as with a Brita (carbon) filter or something similar?
    No. RO removes minerals (total dissolved solids) from the water. Carbon filters remove chlorine and perhaps some other contaminants that make water taste not so great, but don't alter the minerals.

    Susan

  5. #15
    Dorsetman's Avatar
    Dorsetman is offline Senior Member
    Real Name
    Geoff Hands
    My Grow Area
    Greenhouse
    Favorite Orchid(s)
    Cattleya ?
    Join Date
    Oct 2010
    Location
    England, South coast.
    Posts
    3,249
    Member's Country Flag

    Default

    Quote Originally Posted by TwoStems View Post
    Is RO water the same as filtered water, as with a Brita (carbon) filter or something similar?
    Short answer - no. The filter can remove some of the impurities but not the dissolved salts. The dissolved content can be measured with an EC meter. IO find that the reading from my tap water where I live is just the same , before and after using a Brita or similar filter - although any trace of chlorine taste has gone.

  6. #16
    TwoStems's Avatar
    TwoStems is offline Senior Member
    Real Name
    Ali
    My Grow Area
    Under Lights
    Favorite Orchid(s)
    the weird ones
    Join Date
    Apr 2011
    Gender
    Female
    Location
    Northeastern CT
    Posts
    961
    Member's Country Flag

    Default

    Good to know. How does one find RO water? Maybe I should start collecting rain...

  7. #17
    Halloamey's Avatar
    Halloamey is offline Senior Member
    Real Name
    Amey Bhide
    My Grow Area
    Greenhouse
    Favorite Orchid(s)
    Cattleya alliance
    Join Date
    Jul 2009
    Gender
    Male
    Location
    Pune, India
    Posts
    5,363
    Member's Country Flag

    Default

    I am really surprised to know that Geoff, an EC of 600 corresponds to roughly 400 to 450 ppm (mg/L) of TDS which is actually very high for the culture of most orchids. The sap exudate is no more than 0.66% mineral and 1-2 percent sugar, so to get to the figure of 400 mg TDS roughly 40 ml of sap per litre of water will be needed which sounds astronomical to me, could you email me your papers at halloamey@hotmail.com . I can comment more after reading the paper, but don't you think your test subjects (root drippings of Orchids) are biased? Did you have controls like say drippings from other plants like ferns, mosses or directly from the barks of the trees etc?
    Quote Originally Posted by Dorsetman View Post
    Epiphytes grow on other plants , and the water they get is not straight from the sky , it is what has landed on other plants, and then trickled down onto the epiphytes. Most plants in active growth express sap from the leaves - the pressure applied to keep the plant erect and turgid results in some " leakage " - e.g. as "honeydew" ( Try looking at your plants at 2 am - there may be surprised how much ther is then ). This gets dissolved in the rainwater, and provides nutrients to the epiphytes.
    So I discovered when I sat in the rain forest in Thailand, in the rainy season, and took samples of water from the open sky ( EC as low as 20) and then collected drips from the roots of e.g. dendrobiums - and found the EC was up to 600. I did this at several sites,at different times, from several different genera ( paphs, Coleogynes, etc ) and always found more or less the same thing.

  8. #18
    Halloamey's Avatar
    Halloamey is offline Senior Member
    Real Name
    Amey Bhide
    My Grow Area
    Greenhouse
    Favorite Orchid(s)
    Cattleya alliance
    Join Date
    Jul 2009
    Gender
    Male
    Location
    Pune, India
    Posts
    5,363
    Member's Country Flag

    Default

    Geoff, you don't have to say such things, I feel so nice to learn from you senior experienced people, and by the way you did not contradict me, I also said the same thing, I just said it in two sentences, that the orchids sit in decomposing vegetable and animal waste and the water they get is from the rain (which collects nutrients and solubles from these substances was implied LOL)
    Quote Originally Posted by Dorsetman View Post
    Sorry to contradict Amey.

  9. #19
    orchidlady's Avatar
    orchidlady is offline Senior Member
    Real Name
    Susan
    My Grow Area
    Under Lights
    Favorite Orchid(s)
    Phal and Paph species
    Join Date
    Apr 2009
    Location
    Seattle, WA
    Posts
    904

    Default

    Quote Originally Posted by TwoStems View Post
    Good to know. How does one find RO water? Maybe I should start collecting rain...
    You purchase a RO system and hook it up to your water supply to make your own. If cost is a problem, then rain collection may work better for you.

    Susan

  10. #20
    Dorsetman's Avatar
    Dorsetman is offline Senior Member
    Real Name
    Geoff Hands
    My Grow Area
    Greenhouse
    Favorite Orchid(s)
    Cattleya ?
    Join Date
    Oct 2010
    Location
    England, South coast.
    Posts
    3,249
    Member's Country Flag

    Default

    Quote Originally Posted by Halloamey View Post
    I am really surprised to know that Geoff, an EC of 600 corresponds to roughly 400 to 450 ppm (mg/L) of TDS which is actually very high for the culture of most orchids. The sap exudate is no more than 0.66% mineral and 1-2 percent sugar, so to get to the figure of 400 mg TDS roughly 40 ml of sap per litre of water will be needed which sounds astronomical to me, could you email me your papers at halloamey@hotmail.com . I can comment more after reading the paper, but don't you think your test subjects (root drippings of Orchids) are biased? Did you have controls like say drippings from other plants like ferns, mosses or directly from the barks of the trees etc?
    Personally I don’t use TDS figures because they depend on which meter you use. The Hannah meter I use produces TDS figures by multiplying the EC reading by 1.6. They make another which multiplies by 2.0. Those “constants” are appropriate for particular individual salts – but our nutrients are a variable mixture. On the other hand EC is hard and constant . I also feel that EC is so appropriate because what is going on in the moisture in the pot is electro-chemistry; the liquid (water + nutrients) is an electrolyte of course. The heavy metal ions ( or anions or whatever– it’s a long time since I handled all this stuff in my work and I guess I have forgotten the finer points ) even when only present in tiny amounts, will move to the cathode ( or have I got that backwards ?) whatever – they move preferentially to the roots, hence root scorch if the concentration is too high.
    I’m not familiar with the other stuff you mention. I have however experimented on fertiliser concentration in mt Paph collection for some 20 years or so before I went to Thailand and got this data ; I worked down to near pure water, in the belief that orchids don’t want fertiliser – result starved plants. I worked up, until I got burnt roots and leaf tips, I came back to what seemed good ; it turned out to be 600 EC.
    We are not I suppose confusing microsiemens and millisiemens here ?
    But as to bird shit theories – just think about it for ten minutes, it must be so random and unreliable . What is the formula worked out by every horticultural institute in the world ? feed weakly at every watering (!) – this applies to all green plants. Since orchids do so well in the wild, that must be what they get . Bird shit does not even start to have a chance.
    Also coinsider that even twig epiphytes only grow in places where they get rain dripping from other leaves.

    I’ll try to get back to a copy of my work on this subject as published ; it was not saved on this computer and should be in a back-up somewhere, but not instantly accessible. Can’t stop any more on this point – I am in the middle of cooking.

Page 2 of 3 FirstFirst 123 LastLast

Similar Threads

  1. Rain Water / Dehumidifier Water
    By dougroc in forum General Orchid Culture
    Replies: 10
    Last Post: April 4th, 2013, 07:37 PM
  2. Is rain water collected from roof safe?
    By sewcrazy64 in forum New Growers: Ask the Senior Members
    Replies: 15
    Last Post: September 15th, 2009, 02:19 PM
  3. Stained Rain Water ?
    By rich63 in forum New Growers: Ask the Senior Members
    Replies: 2
    Last Post: May 15th, 2009, 01:13 AM
  4. rain water collectors
    By nicki in forum General Orchid Culture
    Replies: 3
    Last Post: April 9th, 2009, 05:04 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
OrchidTalk --An Orchid Growers Discussion Forum brought to you by River Valley Orchidworks. A World Community where orchid beginners and experts talk about orchids and share tips on their care, cultivation, and propagation.