Hydroponics vs Semi Hydroponics

[Ray]

This simplest answer to the original question is that "semi-hydroponics" was a term I coined to differentiate the single-pot, passive form from those with lots of equipment, like aeroponics, thin film, ebb-and-flow, etc.

For orchid growing, it's the preferred method, as there is no shared nutrient bath through which plant pathogens can be spread.

[Sandy4453]

Thank you for these additional replies. I'm having a bit of a challenge keeping up with threads in this forum's format, even mine and didn't realize these replies were posted until now.

Question answered and I'm now a little bit wiser, thanks to these explanations. My paph is going back into coconut husks, fir bark, coir and sphag. later today.

[cb977]

Originally Posted by SRF

Thank you for these additional replies. I'm having a bit of a challenge keeping up with threads in this forum's format, even mine and didn't realize these replies were posted until now.

Question answered and I'm now a little bit wiser, thanks to these explanations. My paph is going back into coconut husks, fir bark, coir and sphag. later today.

Along the top of the forum listings, there's a button that says New Posts. You can click there when you log on and it'll show you all new posts within the past 24 hrs.

You can also subscribe to any thread you're interested in and will be notified whenever a new post is made to the thread you've chosen.

Let me know if you need any help

[OrchidInEveryWindow]

There seems to be a lot of confusion about whether orchids can be grown in "passive hydroponics", such as a vase of standing water (to the top of the roots).
Not only orchids, but many common houseplants can be grown in water only, as has been proven by others who have successfully used this method.
Some orchid roots may indeed die of suffocation and rot in standing water, but orchids will grow "water roots" which are specially adapted to live in water, just as air roots or soil roots are adapted to live in air or in soil or bark. It's this adaptability that allows orchids to survive in changing conditions. I've even read that orchids can have two or three different kinds of roots on the same plant, depending if they are dangling in water, clinging to a tree or growing in the air.

[ericst11]

there's alot of ways to grow hydroponicly and some ways reuse the water and others don't and there are a lot of method some recive a lot of water and others don't it depends on how much water you want and if you want to reuse it .some just use a mix of systems and call them hybrids and in any hydroponic system never use urea or ammonia you'll more then likely burn your plants.

[Sun rm.N.E.]

My experience with passive hydroponics have been positive. For example, I have bloomed cattleyas oncidiums brassavolas dendrobium and bromeliads among others this way. The solution is ~125 PPM nitrogen MSU fertilizer solution changed at least once per week using almost any type of container. All roots must be covered at all times so topping up daily may be necessary. I agree with the method posted on the old Vengers website that algea might aid in oxigenation. In fact, if I see no healthy algae growth soon I treat for pathological organisms until they are eliminated.
My ultimate aim is to transfer everything to SH once healthy growth is established and I can cut off any old growth that still harbors systemic infections. I have none of my plants in organic media currently