Black beauty is very big. I would plant two at most. You could probably grow three of the much smaller Fairy Tales. In Michigan you'd probably get a greater yield in pounds of eggplants from the Fairy Tales.

I used a 5 gallon bucket per plant. I had to water 2 times a day when the temperatures were over 100 degs. Above 90 degrees I water 1-----2 times per day depending on wind.. Between 80-90 degrees at least 4 times a week below 80 degrees didn't happen I have 55 gallon drums halved. I'll do 4 plants each with drums placed on a 3ft. by 2ft grid.Last year I had 21 peppers and 2 egg plants. They behave very similar to each other and were extremely productive.I also started the plants under lights indoors and was picking peppers as I set the plants out. hears a few links and pictures you might get ideas from.

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4ft by 4ft by 2ft growing box CFL lighting 12 bulbs 13 watt each

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as the plants get bigger. Click on either pic to open up display in photobucket use arrow keys on key board

the link provided below contains the best picture of my 5 gallon peppers. I was unable to find eggplant pics and thus are not visible but they do a little better than the peppers plants. Click on the link-picture to get more ideas These plants are on the rooftop garden and get moved around to get more or less light depending on the temperature.

YOU SHOULD DO REAL WELL ALLOWING AROUND 4 TO 5 GALLONS SOIL PER PLANT.

Here is a link that might be useful: https://plus.google.com/photos/111099372377958308731/albums/5864651368775846321/5864653495328454770?banner=pwa&authkey=CI763rvAj8eLAg