I got 5 gallon plastic buckets from Lowe's to use as my containers, because they're so easy to move inside during the early months when the plants are small and the weather and night temps are still unreliable. Even now when my biggest tomatoes are over 3 feet tall, we can still quickly move the buckets to our covered porch whenever there's a severe thunderstorm. I nailed holes in the bottoms and sides for drainage.
My soil is a mixture of four things: regular garden soil (I think our brand was Sta-Green?), organic potting soil, cow manure, and peat humus. I used slightly less peat humus in the soil for the tomato and pepper buckets because I was also using plantable peat pots for the seedlings. I did the mixing in a large plastic storage tub, and my proportions were roughly three shovels of garden soil, two heaping shovels of the organic potting mix, then one heaping shovel of cow manure and one shovel of peat humus. I mixed all of that together thoroughly, then stripped the lower leaves off of my 8-inch-tall seedlings and planted them deep, so most of the bare stem was covered up. I then put an extra shovel of the organic potting mix on the very top, as it contains a LOT of mulching material and acts just like a mulch to keep moisture in, and watered with a homemade transplant solution--a hilarious mixture of two ounces sweet organic tea, an ounce of beer, six ounces of worm tea, and a drop of dish detergent all mixed into 6 liters of lukewarm water. I know it sounds crazy but it's a personal version of what my Grandma used for *her* garden--she didn't have worm tea, though, so that's my contribution for an extra dose of nitrogen right from the start. ;)
My container plants stay out in full sun from 10:00 am until roughly 7:00 pm. We don't let them get rained on at all because this is West Virginia and we have air pollution problems thanks to the mining operations in the area--if we see rain on the radar, we bring the plants up onto the covered porch. I don't have a watering schedule, per se--I just have a gut feeling about when they need water, and so far my gut seems to be pretty accurate. Out of a seven day week, my container plants get watered at least four or five of those days--if I skip a day, I wait for a cloudy, mild day so they don't get scorched. As I said, they never, ever get rained on. Maybe this is a factor for you? Have you checked your area's air pollution stats?
My feeding schedule is simple--I give them worm tea once a month, and diluted skim milk once a week while they're fruiting. I haven't seen any wilting or yellowing leaves yet, but if I do, I'd probably treat it with an extra dose a worm tea and a spritz of the milk solution on the leaves. For the flowers, I flick them by hand to help them pollinate because we don't have enough honey bees around here to do it for me. My tomatoes have one small metal stake to help support them--it looks like this:
I'll probably have to get a bigger one eventually, but using this small one seems to have induced my plants to grow really thick, strong central stems, and even though they're fruit-laden, nobody's bending under the weight. :)
Here are some pics I took about a week ago:
This is the whole tomato jungle from above. They all so bushy and healthy. I had actually JUST pruned some of the lower foliage right before taking this pic, believe it or not. *laughs*
Here they are! The little pots to the right are banana peppers, purple opal basil (hard to see, but it's there), my Isis Candy cherry tomato plant which is much younger than the Big Boys, and the tall one in the rear is my nephew's sunflower that they started from seeds as a little class project. I'm helping him keep it going.
This particular tomato has been claimed by LyricKid because it's the first one starting to show signs of ripening. ;)