plant biology
Tendril
Last reviewed 2026-10-04
A tendril is a slender plant structure that coils around a support and helps a climbing plant grow upward or across a surface. Depending on the species, a tendril can develop from a stem, leaf, or leaf part. It is an adaptation for support rather than a root.
What it means
Tendrils respond to contact and may coil around trellis wire, string, or another plant. The way they attach varies by crop. Peas use tendrils differently from grapes or cucumbers, so support size and spacing should fit the plant.
How it affects the garden
Install support before vines become tangled. Give climbing plants enough light and room for airflow, and guide young growth gently rather than pulling mature tendrils loose. A support that is too smooth, weak, or wide may not work well.
The plant spacing calculator helps plan a trellis footprint. The sun calculator helps classify the site, but the crop's mature growth still determines support needs.
Example
A pea tendril wraps around a narrow trellis string. As the stem extends, the support keeps leaves and pods above the soil and improves access for harvesting.
Common confusion
A tendril is not the same as a thorn or a runner. It is a flexible climbing structure, while a runner is a horizontal stem that can form a new plant.
Sources
University of Minnesota Extension explains trellising and support for pea plants.
