Breaking the rules?
User Name

Registration is FREE. Click to become a member of OrchidBoard community
(You're NOT logged in)

menu menu

Donate Now
and become
Forum Supporter.

Breaking the rules?
Many perks!



Fauna Top Sites
Old 11-29-2018, 09:45 AM
orchidphile orchidphile is offline
Jr. Member

Join Date: Sep 2018
Posts: 20
Breaking the rules? Female
Default Breaking the rules?

Hi, everyone.

I've been using semi-hydro with great success. I recently watched a YouTube video of a presentation by Thomas Voytilla, given to the Tip of Texas Orchid Society. This gentleman grows a lot of orchids in semi-hydro, with great results, and said he doesn't use the flooding method to water--he just tops off his reservoirs and says it works fine. If I remember correctly, it was also this video that said flushing with plain water isn't necessary either. He's apparently been doing neither and getting away with it for years. Is it possible that semi-hydro can be even easier than we already thought?

Last edited by orchidphile; 11-29-2018 at 09:57 AM..
Reply With Quote
Old 11-29-2018, 10:01 AM
WaterWitchin's Avatar
WaterWitchin WaterWitchin is offline
Senior Member

Join Date: Feb 2011
Zone: 6a
Location: Kansas
Posts: 612

Well, it may work for him and his particular culture and climate and orchids he grows that way. It wouldn't work for me, as I've tried it quite a few years back. Build up of salts on ones I don't use R/O or pond water on. Build up of "mush" in reservoir of root debris as they transitioned.

Wonder if he fertilizes? I would be concerned about a build up over time in my culture, even though I don't fertilize often.

What works for one "might" work for another. Depends on a lot of other factors... and mine don't suit it.
Reply With Quote
Old 11-29-2018, 12:42 PM
Subrosa's Avatar
Subrosa Subrosa is offline
Senior Member

Join Date: Jul 2013
Zone: 6b
Location: PA coal country
Posts: 2,612
Breaking the rules? Male

Many people have difficulty discerning the difference between proving something and getting away with something.
Be who you are and say what you think. Those who matter don't mind and those who mind don't matter.
Reply With Quote
Post Thanks / Like - 1 Likes
Likes WaterWitchin liked this post
Old 11-29-2018, 01:19 PM
Ray's Avatar
Ray Ray is offline
Senior Member

Join Date: May 2005
Location: Oak Island NC
Posts: 9,809
Breaking the rules?

Tom learned about S/H from me, during a presentation I gave to an orchid society in Virginia, and he has apparently changed what I taught him. Here's why I disagree with that approach, but why some might get away with it, at least for a while:

In a semi-hydro pot, the vast majority of the evaporation occurs in the top portion of the column of medium, in a gradient, of course.

As the water evaporates, dissolved solids in the liquid - fertilizer nutrients, whatever was in the water, and plant wastes - reach their maximum solubility levels and precipitate.

If you water properly, which means frequently flooding the pot to the top with nutrient solution and letting it drain, you flush the pot, mostly redissolve those residues, saturate the medium, and refresh the chemistry of the solution in the reservoir.

If you only top up the reservoir, that evaporation/precipitation process continues unabated, allowing the residues to accumulate to the point of being toxic to the plant.

Now some caveats to that:

If your growing environment has very high humidity, the wicking ability of the LECA outstrips the evaporation rate, so the top stays wet, and precipitation is kept to a minimum. While the "Flush At Every Watering" (FAEW) technique is still preferred, it is far less crucial to the long-term health of the plants.

Likewise, if you sell that plant before the buildup becomes an issue, "it's never a problem" (to you), and if you dump the old LECA when you repot the plant - something I don't bother with because I water correctly - you're dumping the precipitates, too.
Ray Barkalow, Orchid Iconoclast
Want Better Plants? READ THIS

Free Shipping in the US! (see terms & conditions for details)
Reply With Quote
Old 11-29-2018, 03:58 PM
Leafmite's Avatar
Leafmite Leafmite is offline
Senior Member

Join Date: Sep 2010
Zone: 5b
Location: Ohio
Posts: 9,069
Breaking the rules?

Claims like this are why it is always wise to follow one's own path when growing plants. I grew orchids with no trouble at all for many years until I discovered online information. Then I thought I could grow better if I followed online advice. Yeah, now I have learned to do what works for me after researching the climates of the native environment and growing habits of my plants' ancestors.

My feelings about this is that it is possible he is not having any issues because he might be getting lucky with chemistry. Water quality can be very different from place to place. Rain tends to bring with it anything that is in the air and tap water brings whatever is in the lake, river, or 'well'. Still, I think his luck will eventually fail.

I highly recommend flushing not only orchids in S/H but the soil-based plants, too, as it keeps them healthy. Plants that are not flushed periodically will usually fail to thrive after a time due to various unused minerals/nutrients becoming unbalanced and, if there is even a tiny trace of salt, it will surely become toxic in time. Flushing allows one to restore the balance in a plant's medium.
I decorate in green!
Reply With Quote


flushing, plain, semi-hydro, video, water

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Is it against the rules..... Cheddarbob14 Off Topic - Totally 4 10-09-2018 11:09 PM
Taxonomic rules for varietal names? Fairorchids Scientific Matters 10 09-13-2018 10:20 PM
Customs rules? Kailyn Beginner Discussion 2 02-24-2013 08:40 AM
Hello Everyone! Just me breaking the ice! Carolsorchids Introductions - Break the Ice ! 11 07-18-2012 08:32 AM
The Man rules - FUNNY Chubidubi Off Topic - Totally 9 10-29-2008 08:50 PM

All times are GMT -4. The time now is 10:30 PM.

© 2007
Search Engine Optimisation provided by DragonByte SEO v2.0.37 (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

Clubs vBulletin Plugins by Drive Thru Online, Inc.