Hello Brooke, When I suggested to Larissa if she uses a Ziploc that she not use any potting medium because she is fighting scales. If you have an orchid that has no roots you also dont need a potting medium. Here are some pictures of small paphs growths that broke off during potting that I ziplocked. This is the paph pictured in the bag above. You can see the new root growth just where the brown meets the green. There is a similar new root on the other side. This is after two weeks. This is another paph broken off during repotting. Root after about a month in a ziplock bag. There is a new leaf also growing from the apex, but you canÂt see it in this photo. When the roots get about an inch I will pot them up in bark, continue zip locking until the roots get well established in the medium. You can use sphag but it breaks down very quickly in this environment. What is happening is that the Ziplock bag is air tight, so the little bit of moisture that is in the bag stays in the bag creating 100% humidity. You donÂt need medium to hold the moisture. The bag contains it. Moisture travels into the cells that are desiccated. When you blow into the bag you raise the CO2 level up slightly in the bag helping with the plants carbon fixing. This helps in creating new growth. I admit not to do any experiment to prove this against not breathing in the bag and just filling the bag with air, but I feel reasonably assured that that is what is happening based on my experience and knowledge. I assume this bag would be out of any direct sunlight during recuperation? Yes. Whenever any person, animal or plant is recuperating the less stress the better. The bag method does not guarantee that a unhealthy orchid will recover. Some are headed south no matter what you do. Hello Sheila, How long in the baggie is 'a long time'? a week, a month? Once a orchid has fully recovered or reestablished roots into a medium you can take it out of the bag. I once did an experiment where I had a paph that had no roots. I bagged it grew the roots, potted it, put it back into the bag, and grew it for about three years in the bag. I wanted to see how long I could grow it in the bag after three years I decided it could go for as long as one wanted. One caveat was it didnÂt flower in the bag. During the three years I would add water from time to time, once the roots were established a little water with fertilizer. The roots grew well even outside the pot and you could see the fuzzy root hairs found on paphs. There were a few growths and a strong root system when I took it out of the bag and flowered it. I either gave it away or sold it. I thought I had pictures of it, but canÂt find them now. 'Every now & then opening the bag', same question, once a day, couple times week??? Once a week usually but I admit to be lacs-a-dasial about it. I would sometime blow up the bags whenever they looked like they were going down. If you blow into them more regularly you will probably have better results. Incidentally, I also use this trick if I am going on vacation, and some orchids need to be watered during the time I am not there. I havenÂt lost any healthy orchids

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You already asked this ... Please keep the discussion all in one spot http://ths.gardenweb.com/forums/load/comphelp/msg0118382512360.html?3 Here is a link that might be useful: Your previous post

There are a few reasons, other than soil content, why a rose may appear chlorotic. One is if it receives more water than it should and the other may be due to some issue with its root system. Often this kind of light chlorosis is due to a combination of too much rain or irrigation and a less than perfect root system and goes away as the season progresses. This does not appear to me to be iron deficiency chlorosis but rather a slight lack of nitrogen, though I may be wrong. Nitrogen deficiency often follows too much rain or irrigation. Another case I have encountered was a limestone rock burried within the bed which was not removed during bed preparation. One plant may have extended its roots towards the rock, resulting in high pH induced chlorosis while the other may have mostly grown its roots the other way. A concrete wall foundation can have the same effect.