Wash the glasses with mild dish liquid and dry them with soft cloths. This removes residue and dirt that might cause bacteria growth in your garden. Hold the glasses up to the light to ensure if you removed everything.
Examine the shape of each glass to determine what kind of plant should go in it. Wide, deep glasses, like red or white wine goblets, can accommodate aloe or mint, while a shallow glass might work better for shallow-rooted plants. Champagne flutes work best with slow-growing, tiny plants.
Fill the bottom third of each glass with coarse sand. The amount required varies by glass. For instance, one-third of a wine goblet may mean 1 inch of sand, while a margarita glass only needs ½ inch.
Add ¼ inch to 1 inch of sphagnum moss to each glass, depending on its depth. The moss should fill about 1/6 of each glass. Sprinkle a little soil on top of the moss.
Place a seedling in each glass and fill the glasses full with soil.
Add enough water to each glass so that you can see it trickle through the moss and into the sand. Set the glasses in a sunny window.