American Hosta Growers Association
Hosta Clump Size Standard

The AHGA developed the following hosta clump size standard in 2012 to address a void in the industry for a broadly accepted standard. The final standard is not perfect, but it is simple and it addresses the needs of the overwhelming majority of our hosta customers as well as most gardeners in general. While this standard is based on clump height, clump width is also addressed.

This standard addresses “head on” the simple fact that hostas do indeed grow larger in the North than in the South. As growers, most of us market to customers in both the North and the South. A size standard that addresses these regional differences is helpful in educating and managing our customers’ expectations.














Notes:
AHGA HOSTA CLUMP SIZE STANDARD Hosta Clump Height
Size
North
South
Mini
up to 8"
up to 7"
Small
9-14"
8-11"
Medium
15-22"
12-18"
Large
23-29"
19-24"
Giant
30" and above
25" and above
"North" = Above I-80
"South" = Below I-40