A subshrub (Latin suffrutex) or dwarf shrub is a short woody plant. Prostrate shrub is a similar term. The term often is used interchangeably with bush

The definition of a subshrub is not clearly distinguishable from that of a shrub; examples of reasons for describing plants as subshrubs include ground-hugging stems or low growth habit. They may be largely herbaceous, with overwintering perennial woody growth much lower-growing than deciduous summer growth. Some plants described as subshrubs are only weakly woody and some persist for only for a few years. Others however, such as Oldenburgia paradoxa live indefinitely, rooted in rocky cracks.

Small, low shrubs such as lavender, periwinkle, and thyme, and many members of the family Ericaceae, such as cranberries and small species of Erica are often classed as subshrubs.