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  • 1 Post By raybark

S/H fertilizing

This is a discussion on S/H fertilizing within the Semi Hydro / Lights / Greenhouses / Accessories forums, part of the Orchid Culture category; I use RO water and MSU for fertilizing my S/H potted plants. Sometimes I add ...

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  1. #1
    moniluhum is offline Senior Member
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    Default S/H fertilizing

    I use RO water and MSU for fertilizing my S/H potted plants. Sometimes I add Kelpmax as a foot stimulater. When using this to fertilize should I leave this mixture in the reservoir. or should I water it out afterwards? I heard that leaving the fertilized water in the reservoir might burn the roots.

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    ksriramkumar is offline Senior Member
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    Monica, for S/H potted plants, what I do is use a weekly weak fertilizer and flush it every 3rd watering or so. I fertilize on Sunday and flush it on Wednesday and top-up rest of the days with rain water. orchids are doing ok. I am just following this method and could be fine tuned more. will wait for other members to chip in.

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    moniluhum is offline Senior Member
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    using this method do you notice growth in the roots in the media as opposed to the ones on top?
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    raybark is online now Senior Member
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    Monica, as the person who developed the technique for orchid growing, my recommendation is as follows:

    1. Mix your fertilizer VERY dilutely. I use the equivalent of 1 teaspoon per 6 gallons of solution using the MSU formula. No problem adding KelpMax to that monthly.
    2. Use that solution EVERY time you water.
    3. Water frequently.
    4. When you water, flush the pot thoroughly - fill the pot to the top rapidly, and let it drain. Occasionally, in the process of watering, I'll go back and hit every plant another time, to make sure they're well flushed.
    5. Walk away and leave 'em be.

    Follow those guidelines and you'll never burn the roots, and will have little-to-no buildup.

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    moniluhum is offline Senior Member
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    okay ray I will certainly follow your method from now on. do you think the fact that I have been using the regular dilution for these plants has caused harm or delayed growth to them. I have not lossed any of the plants and most have grown roots on top of the rocks ( forgot the real name)?
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    Unless you have obviously burned the roots (unlikely), about the only issue with overfeeding is that it can suppress blooming.

    What types of plants are putting roots out only on top? Many plants, especially phals, will do so in order to "grab hold" of the potting medium over a larger area, to give themselves a larger mechanical base for greater stability.

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    78Terp is offline An Avant Gardner
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    I use a very weak solution with one of my 4 'fertilizers' I use. Though the worm tea is usually the strongest I mix up. I use one of them almost every time. On occasion I will use plain tap water to flush the pot out. But I do as Ray recommends. Fill rapidly to the top of the pot. I try not to over flow the pot as the leca likes to wash out of the pot when I do overflow. I let it drain and then replace it back to its 'spot'.

    I have generated flowers or flower spikes (I only moved into s/h around March 1) on a number of orchids since using this method. Even my almost dead catt has rebounded and flowered (a tortured looking flower I did not post) in s/h. I have a onc Sweet Sugar in spike in s/h. And my sederia japonica (I understand it is now classified a phal) loves s/h and spiked 1.5 months after getting into s/h for its first blooming.

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