Answer: Unfortunately, most houseplants seem to be started from cuttings or divisions rather than seeds, but here are a few plants that would grow indoors at least initially: basil, chives, parsley, leaf lettuce, and coleus. Unfortunately, I can't think of any flowers to start from seed that would do well indoors in a three inch pot. The number of seeds to include would depend to some extent on the grower's thumb color (green or brown), but about a dozen of each kind should be about right. This would result in a little clump of chives or parsley, a snippable bunch of lettuce, and several basils or coleus.
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