You are not asking a simple question here...

The methods of "forcing" blooms has been done for years with many genera of plants. If you have ever bought a Euphorbia pulcherrima, (aka Poinsettia), blooming around Christmas time, you know exactly what I mean, as these naturally bloom in spring.

For Passiflora, I don't know if "forcing" a plant to bloom at an unnatural time is actually what you are intending. It sounds to me that you will be overwintering some plants indoors with supplemental light, and are hoping you can get them to bloom. That is going to depend on a few things.

Most importantly, what species are you growing? Different species bloom at different times of the year. For us, P. loefgrenii bloomed all winter with supplemental lighting, but it was fairly natural for it to do so. We supplied all of our plants with lighting that would be approximate to the natural daylight outside. If you are trying to get a summer bloomer to bloom in the winter with this method, you have a long hard road ahead of you.

Plants that typically bloom in the summer, unless you can provide a fantastic light spectrum for approximately 16 hours per day,(extremely expensive for the purchase of the lights and to run), the flowers will be smaller, paler, and sometimes quite morphed.

I think your best bet is to overwinter your plants indoors and bring them out to enjoy in the warm months. Don't try too hard to get them to bloom indoors. You are asking for disappointment. Granted, I am sure it can be done, but it is much more effort than I would be willing to put forth.

As for the super small planter idea: Yes, that may be possible. I have never tried. We have had fantastic luck by not restricting the roots. Logically, you may get one great season of blooming with this method, but you are not going to end up with a long term, happy, well adjusted plant. Not to mention the high maintenance of perfect watering and fertilizing... not too little, not too much. With a heavily root bound plant, you have to get it just right. From experience, we know that can be a nightmare.

If this answered your questions, great! If not, feel free to email me, or respond here.

Best wishes,
Eric Wortman and Crystal Stone

I winter over many of the non hardy passies. Some will bloom and others don't. I think, like Eric said, a lot depends on when their natural bloom cycle is. Most important is a high quality, broad spectrum grow light. Not just for flowering but to keep the foliage healthy and growing throughout the winter. I use HID MH and HPS lights and even then most of the bloom's colors are somewhat muted inside. My plants do better in larger containers. I use extra potassium to promote buds. I don't know if it really works but read it some years ago. I dig a small amount of chopped banana peels into the soil. Not sure if it's the extra potassium or just the organic matter breaking down that helps.

Thanks everyone for your posts. Here is exactly what I am trying to do. I currently sell some plants on ebay and I would like to start doing so at a local flea market. I have the lighting systems to provide indoor growth in MD and what I am actaully trying to do is to get blooms from younger plants that I would take to the flea market to sell. Im sure after they are sold they would be replanted into larger containers.
I am currently experimenting with the best cloaning technique (I know its not really cloaning) and have many cuttings setup in a ezcloan machine. I should be able to produce large amounts of plants but would like flowers on the little guys which I belive would make anyone buy them as the flowers are fantastic. I currently only have P. Incarnata which outdoors grows and flowers effortlessly.

I don't know if it's possible or not. I've started cuttings taken from mature stems and usually have to wait quite a while for flowering. You really can't take stems already in bud for rooting because the buds need to be removed.

How do you like the EZ Clone? It looked really nice but the price was a bit high. I ended up making an aeroponics chamber that works great though it's not aesthetically pleasing.lol

The EZ-cloan is OK I guess. I bought it used and have had problems with it. First the manifold the water goes through broke and I had to use a 2 part epoxy to put it back together again, I also built a spare unit out of pvc incase it breaks again. Then I was getting mold because if you get an aeroponic unit above 78 degrees in the water res tank, your doomed to failure. I bought an aquarium water chiller to fix that and pump the water throug the chiller to keep it at 70 degrees. That was a recent purchase and I am testing it now to see if the ez-cloan is any better/faster then just using a bucket of water with an air stone in it. I will post results when this test is done, in about a week. Its been a week so far with my cuttings of the p. incarnata in the cloaner and no roots yet, but it should take 2 weeks.