In article , Frogleg
writes:

The fun of many of these trials aren't so much producing fruit, as
making something grow. I often plant ginger and have achieved several
pretty plants, but by no means a sure supply of ginger. A sprouting
garlic clove is worth planting, and a chunk of horseradish must be
confined, or it will take over your garden. Even if not suited to the
outdoor climate, a pineapple or citrus may be an interesting
houseplant.



And don't forget the ''sweet potato in a jar'' plant.
(Put the end of the potato into water as you would
an avocado seed)
You can also have nice plants for outside:
when the stems on the sweet potato are about 3-4 inches long,
Gently pull them off and put the ends in about 1/2 inch water.
As soon as roots begin to develop, either plant outside or into pots.
They can go outside when danger of frost is past, (very frost tender.)
They will even bloom with small, morning glory-like flowers.

Emilie
Nor Cal