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Fertilizing S/H plants

This is a discussion on Fertilizing S/H plants within the Semi Hydro / Lights / Greenhouses / Accessories forums, part of the Orchid Culture category; Hi all, I have about half my plants in S/H, starting back last summer. Most ...

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  1. #1
    mtequine's Avatar
    mtequine is offline Senior Member
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    Default Fertilizing S/H plants

    Hi all,

    I have about half my plants in S/H, starting back last summer. Most are doing well, lost one oncidium recently that I was nursing along...but otherwise everything is happy.

    I know that said online s/h guru where I ordered my supplies sells the MSU fertilizer and suggests that is added at 125ppm at each watering with monthly or so flushing of the reservoir. And, they soak the medium in the KLN rooting formula as well....

    Does anyone who does s/h use SuperThrive at all?

    Thanks....

    MtEquine

  2. #2
    uncasteeb's Avatar
    uncasteeb is offline Senior Member
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    Default

    I generally do not use SuperThrive but i have from time to time , especially when changing a plant over to s/h.
    I do not use it regularly as it has been linked(rightly or wrongly) with flower deformation.If the dosage is low(1 drop per gallon) i cannot see it doing much harm.
    Note fert levels should be a lot lower with s/h compared to more regular mediums as the fert mix is available to the plants all the time.So 125PPM sounds about right.For my Phrags i do fert @ a slightly higher level but i do flush with rainwater during the week(fert on Sunday & flush on Wednesday)
    & also i use "natural" ferts that do not have such a problem with building up of salts.

  3. #3
    WEA
    WEA is offline Junior Member
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    Default

    I use Super Thrive or KLN in a pre repot soak when repotting to S/H. I continue using it at every watering for at least a month until the replants are well established. The results were so good that I use when repotting all my plants into either Prime Agri, bark or sphagnum. I also use it as a pre soak in Sphag & Bag.

    I was having poor root development on my Vandas. I started using it once a week and root development has improved significantly. I’ve heard about over use resulting in bloom distortion, but what is over use? The comment about using one drop per gallon is interesting and I’ve seen it somewhere before. It also worries me a little since I have been using ľ tsp per gallon for weekly waterings of my Vandas during the growing season and have a tendency to slip it into my fertilized regime (by accident of course). The only results so far are lots of shiny white roots followed by a prolific number of new growths. Maybe I’ll pay the piper come blooming time, but with possible concerns about bloom distortion, I’ll probably discontinue using it after the psuedobulbs plump up.

    The big question I have is, if it works so well in root development and subsequent development of new growth, why can’t we use it all the time during the growing season? Has anyone actually used it on a regular basis, and if so with what positive or negative results. It would also be nice to know what amount to use for various orchid related activities i.e. pre soaks, regular watering etc.

    The only negative thing that has happened to any of my plants since I started using it regularly is with my Phalos. I’ve had 2 cases where the new leaf did not open. That part of the plant is still healthy, in fact one of them put out a bloom spike and flowered normally (No Distortions), but both plants stopped growing from that axis and put out a basal kikis. The basal kikis are so far fine and healthy and as large as the parent plant. I just repotted one of them. I’m going to leave momma in the pot and see what happens.

    The humor of this was that I saw ads for this product 20, maybe 30 years ago, but the colorful label and spectacular claims seem like used car salesman hype to me and I passed on using it. I only started using it recently because of the orchid forums. I’m hooked. My wife soaks her bare root day lilies in it before planting. Everything that goes in the ground around here gets a presoak or a drench after planting.

    Sorry my posts tend to be so long winded.

  4. #4
    Diane's Avatar
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    I add Superthrive to my fert mix at about 2 drops per gallon each time I fertilize. I do not fertilize as often as most, only about twice a month.

  5. #5
    WEA
    WEA is offline Junior Member
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    Default Response to Super Thrive Use

    I use Super Thrive or KLN as pre repot soak when repotting to S/H. I continue using it at every watering for at least a month until the plantís root system appears to be well established. The results were so good that I use when repotting all my plants into either Prime Agri, bark or sphagnum. I also use it as a pre soak in Sphag & Bag.

    I was having poor root development on my Vandas. I started using it once a week and root development has improved significantly. Iíve heard about over use resulting in bloom distortion, but what is over use? The comment about using one drop per gallon is interesting and Iíve seen it somewhere before. It also worries me a little since I have been using ľ tsp per gallon for weekly waterings of my Vandas during the growing season and have a tendency to slip it into my other fertilized regimes (by accident of course). The only results so far are lots of shiny white roots followed by a prolific number of new growths. Maybe Iíll pay the piper come blooming time, but with possible concerns about bloom distortion, Iíll probably discontinue using it after the psuedobulbs plump up.

    The big question I have is, if it works so well in root development and subsequent development of new growth, why canít we use it all the time during the growing season? Has anyone actually use it on a regular basis, and if so with what positive or negative results. It would also be nice to know what amount to use for various orchid related activities i.e. pre soaks, regular watering etc. A range of 1 drop to ľ tsp/gallon seems a bit large.

    The only negative thing that has happened to any of my plants since I started using it regularly is with my Phalos. Iíve had 2 cases where the new leaf did not open. That part of the plant is still healthy, in fact one of them put out a bloom spike and flowered normally (No Distortions), but both plants stopped growing from the main axis and both put out basal kikis. The basal kikis are so far fine and healthy and as large as the parent plant. I just repotted one of them. Iím going to leave momma in the pot and see what happens. Is this a result of using ďtoo muchĒ Super Thrive? I havenít a clue, and no one else in the forums ever seemed to have had unopened leaves on Phalos, so I guess weíll never know.

    The humor of this was that I saw ads for this product 20, maybe 30 years ago, but the colorful label and spectacular claims seem like used car salesman hype to me and I passed on using it. I only started using it recently because of the orchid forums. Iím hooked. My wife soaks her bare root daylilies in it before planting. Everything that goes in the ground around here gets a presoak or a drench after planting.

    Sorry my posts tend to be so long winded.

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