I do. I add an organic fertilizer around the base every 2-3 weeks. I also spray about once a week with fish emulsion/kelp.

Agree that unlike normal garden plants, container plants all require regular nutrient supplements to compensate for all the nutrients that wash out whenever you water. Unfortunately it isn't as easy to time those applications to the growth cycle of the plants as it is when planted in ground.

Normally with tomatoes I only feed after each cycle of fruit set but when it is in a container it isn't possible to wait that long between feedings or the plant suffers.

Frequency of application also depends on which type fertilizer you are using.

You might check with the folks over on the Container gardening forum for tips on how they do it.

Dave