Which grass variety is known for its clumping growth habit?

The grass variety known for its clumping growth habit is often identified as Blue Fescue. This perennial grass is characterized by dense, tufted clumps that maintain a tidy appearance in the landscape. Blue Fescue typically forms compact mounds of narrow, blue-green leaves, making it an attractive choice for borders and rock gardens. Its clumping nature allows it to effectively hold its shape and prevents it from spreading uncontrollably, which is a desirable trait for many garden settings.

While Clumping Bamboo does exhibit a clumping growth habit, it is technically classified as a grass but often differs in usage and maintenance. Fountain Grass, on the other hand, tends to spread more widely and can be more aggressive in growth, occasionally displaying a more loose and flowing habit rather than a defined clump. Imperata cylindrica 'Rubra', commonly known as Japanese Blood Grass, can also spread through rhizomes and does not inherently have a clumping growth habit like that of Blue Fescue.

Thus, Blue Fescue is the appropriate answer when considering a grass variety that is specifically known for its distinct clumping growth pattern.