A stolon is a modified stem that grows horizontally above the ground, producing new plants at its tip or along its length. If you’ve ever seen a strawberry plant send out a long, thin “runner” that sprouts a baby plant a few inches away, you’ve seen a stolon in action. It’s one of the most common ways plants reproduce without seeds, allowing a single parent to generate dozens of genetic clones in a single growing season.
How a Stolon Is Built
A stolon has the same basic anatomy as any other stem: a repeating pattern of nodes (the joints) and internodes (the stretches between joints). What makes it different is what happens at those nodes. Instead of just producing leaves and branches, stolon nodes can sprout adventitious roots, meaning roots that emerge directly from the stem rather than from existing roots. These roots anchor the stolon to the soil surface and absorb water and nutrients. Leaves and even small branches can also form at the same nodes, giving the new growth everything it needs to eventually survive on its own.
Stolons typically have elongated internodes and only rudimentary, scale-like leaves along most of their length. Many also have a distinctive hooked tip that straightens out as the daughter plant develops. This stripped-down design makes sense: the stolon’s job isn’t photosynthesis, it’s reaching new ground as quickly as possible.
From Parent to Daughter Plant
The process starts when a parent plant sends out a stolon that grows laterally across the soil surface. When the stolon reaches a suitable spot, the tip or a node begins developing roots and leaves, forming what botanists call a ramet, or daughter plant. At this stage, the daughter is completely dependent on the parent for water, sugars, and minerals. The stolon functions as a supply line, maintaining continuous vascular connections that transport everything the young plant needs.
Research on spider plants (Chlorophytum comosum) has shown just how critical this connection is. In the earliest stages of development, daughter plants have almost no ability to photosynthesize or absorb water through their own roots. The stolon acts as a lifeline, delivering carbohydrates, water, and even signaling molecules from the parent. As the daughter matures, its own vascular tissue thickens, its roots develop, and its photosynthetic machinery ramps up. Only once the daughter achieves metabolic independence does the stolon begin to wither, though it can persist for a surprisingly long time, even helping buffer the young plant against drought by maintaining minimal water flow.
Stolons as Energy Reserves
Stolons aren’t just transport cables. Their internodes store soluble carbohydrates and proteins that can be redirected to attached daughter plants when needed. This storage function has real consequences for survival. Studies on clonal plant fragments found that pieces with longer stolon segments attached had a significantly higher probability of surviving after being separated from the parent. The more stolon, the more stored energy the fragment could draw on while establishing itself. This makes stolons especially important for plant resilience after disturbance, whether that’s a flood breaking apart a colony or a gardener taking cuttings.
Stolon vs. Rhizome
Stolons and rhizomes are easy to confuse because both are horizontal stems that produce new plants. The key difference is location: stolons grow above the ground (or right along the surface), while rhizomes grow beneath it. Rhizomes tend to be thicker and more robust since they serve as underground storage organs. Stolons are typically thinner and more exposed.
The distinction gets blurry in practice. Potato “stolons,” for instance, are technically underground stems that behave more like rhizomes, growing below the soil surface with scale-like leaves and eventually swelling into tubers at their tips. Botanists sometimes use the terms loosely depending on the species, so don’t be surprised if you see overlap in gardening guides.
Strawberries: The Classic Example
Strawberries are the textbook stoloniferous plant. Each runner that extends from a mother plant is a stolon, and each stolon typically produces 1.5 to 2.6 daughter plants along its length. A single strawberry plant grown in standard conditions can generate around 5 daughters over a three-month period. Under more favorable conditions, like protected low tunnels with a longer growing season, that number jumps to roughly 9 daughters per plant. Extend the growing period to six months in an ideal environment and a single mother plant can produce 4 to 13 times more offspring than it would in a typical three-month field season.
Other Plants That Spread by Stolons
Stolons appear across a wide range of plant types. Spider plants are the most familiar houseplant example, dangling their daughter plantlets from long arching stolons. Boston ferns, string of hearts (Ceropegia woodii), and saxifrage also spread this way indoors. Outside, Bermuda grass colonizes lawns aggressively through stolons, which is why it can be so difficult to contain. Bugleflower (Ajuga) is a common ground cover that fills in gaps the same way. Even some woody plants use stolons: red twig dogwood and bottlebrush buckeye both spread outward from established plants to form large patches over time.
Why Stolons Matter Ecologically
Stoloniferous growth gives plants a powerful competitive edge. A single plant can colonize a large area without producing seeds, and every daughter shares the parent’s exact genetic makeup, meaning a genotype that’s well-suited to local conditions can rapidly dominate. Connected clones can also share resources: a daughter rooted in nutrient-rich soil can potentially receive water from a parent with better access to moisture, and vice versa.
This same ability makes some stoloniferous species serious invasive threats. Alligator weed (Alternanthera philoxeroides), for example, has spread across large areas of China through fragment dispersal. Small broken pieces of stolon carrying enough stored energy can drift to a new location, root, and establish an entirely new colony. The ability of tiny clonal fragments to survive and grow after disturbance is one of the main reasons certain introduced species are so difficult to eradicate once established.
Propagating Plants From Stolons
If you’re growing stoloniferous plants at home, propagation is straightforward. For strawberries, let the runner extend until the daughter plant develops visible roots and a few leaves, then pin the daughter to the soil (or into a small pot set beside the parent) to encourage strong rooting. Once the daughter is growing independently, snip the stolon connecting it to the mother plant. The same approach works for spider plants: let the dangling plantlet develop small roots, pot it up, and cut the stolon once new growth appears.
Timing matters. Severing the stolon too early, before the daughter has functional roots and some photosynthetic capacity, forces the young plant to survive on whatever energy is stored in its small section of stolon. Waiting until you see active new leaf growth is the simplest way to confirm the daughter is ready to be on its own.