In just the last few years the prices of most hosta have come down considerably as more and more people are growing their own, dividing them and even selling them or giving them as gifts. If you can grow a large enough quantity of hosta, however, and divide them enough times, a good living may be made selling the small plants for even a moderate profit. The trick is in keeping your costs to a minimum.
Rototill your initial planting bed at least 12 inches deep. Choose a well-drained location which receives sun for approximately half the day and break up the soil well with the rototiller.
Add approximately 50 pounds of organic fertilizer per 100 square feet of growing bed. Rototill the organic material into the first 12 inches of soil.
With a spade dig a hole 12 inches deep and at least one and a half times as wide as the expected width of the mature plant. Remember that hostas send out roots to the side, so need a large space to grow.
Make a small cone of soil in the bottom of your hole. Remove your hosta from its pot and shake out most of the soil that came with the plant. Spread its roots over the top of the cone and then gently press your soil around the plant so the point at which the roots and the leaves meet is at ground level.
Water your newly-planted hostas well and then keep the soil most but not overly wet. Hostas can stand dry conditions occasionally and for short periods, but they prefer damp soil.
Separate your hostas in midsummer. Use a large knife or sharp spade to cut individual hosta plants out of your ever-expanding new growth from roots and rhizomes. Lift your hosta plants from the ground carefully, gently shaking most of the soil off the roots.
Place your hosta into a pot and gently press a commercial loam around the plant. Water well and allow to drain. Keep pots damp but not too wet. Add a commercial nitrogen-based fertilizer following manufacturer's instructions and water well.
Advertise your hostas for sale if you intend to sell them yourself. Place the plants in your front yard or in another location where they can be easily seen. Selling small to medium-sized hostas for approximately $4.95 insures brisks sales, although your pricing may vary depending on the type and color of hostas you are selling and on local conditions.
Wholesale your hostas to small nurseries or other sellers if you do not wish to deal with the general public yourself.