When planting hostas, the spacing depends largely on the size of the variety:

• Large hostas should be planted about 30 to 36 inches (2.5 to 3 feet) apart.
• Medium-sized hostas require spacing of about 18 to 24 inches.
• Small hostas should be spaced 12 to 18 inches apart.
• Dwarf varieties can be planted 8 to 12 inches apart

Some sources suggest spacing can range from 1 to 4 feet apart depending on the variety, with larger varieties needing more room to spread and fill in

. For example, very large hostas that grow up to 3 to 4 feet wide might be spaced 4 to 5 feet apart to allow full growth without crowding

. In summary, spacing hostas according to their mature size ensures healthy growth and a fuller garden appearance without overcrowding. Adjust spacing based on the specific variety's expected spread, with larger plants needing more distance between each other.