Clear a location that receives at least partial shade. Hostas can take some sun, but do not thrive either in all day sun, or complete shade, according to Ohio State University Extension. The site should have soil that drains well and has slightly acidic soil, about 6.5 on the pH scale.
Incorporate a 6-inch layer of organic matter such as compost or decomposing leaves into the new bed. Either dig or till the compost into the soil to a 10- to 12-inch depth. Add peat moss if your site needs to be slightly more acidic.
Soak the fleshy roots of bare-root hostas in a bucket of water for at least 30 minutes before planting. Tease the roots of pot-bound nursery stock apart with your fingers after removing them from the pot.
Dig planting holes at least 1 foot deep and twice as wide as the hosta's root ball, and 18 t 24 inches apart. Mound soil up in the bottom of the hole and spread the roots of a bare-root hosta around the cone of soil. Add soil to the bottom of the hole to bring a potted hosta up to the level of surrounding soil. in both cases, the crown of the plant, where the leaves grow from the roots, should be at surface level. Fill in soil around the plants.
Water newly planted hostas well and provide at least an inch of water per week. Regular watering in the morning is recommended by OSU Extension, particularly during the summer months.
Fertilize with a balanced, slow-release fertilizer early in the season or a foliar fertilizer every seven to 10 days, according to manufacturer instructions.
Monitor hostas for signs of slug or snail damage -- small, irregular holes in the leaves and slime trails. Keep the area clear of leaf litter and other debris the mollusks can hide under. Protect the plants with rings of copper flashing or hand pick the snails at night to eliminate them.
Divide hostas when they outgrow their spot or their center begins to die out. Simply dig the plant up as shoots begin to emerge in the early spring and slice vertically from crown to roots with a sharp spade to divide the hosta into two to four pieces and replant each, as noted.