Plant Glossary
Houseplant Terms Explained
Clear definitions for the plant words that show up in care guides, propagation tutorials, and troubleshooting advice. 19 terms and growing.
Last Updated: June 2026
Propagation
Nodes, pups, offsets, moss, and the parts that become new plants.
Anatomy
Leaf patterns, petioles, fenestrations, and traits used for identification.
Soil & Potting
Cache pots, perlite, LECA, pon, and drainage terms that affect roots.
Light & Water
Bright indirect light, stomata, transpiration, and why conditions change watering.
All Plant Terms
Propagation
Plant Node
A plant node is the point on a stem where leaves, branches, buds, aerial roots, or new shoots can emerge.
Offset
An offset is a small new plant that grows from the base, side, runner, rhizome, bulb, or root area of a parent plant.
Plant Pup
A plant pup is a small baby plant produced by a parent plant, usually near the base or from a runner.
Roots & Storage
Aerial Roots
Aerial roots are roots that grow from stems above the soil instead of from the underground root system.
Rhizome
A rhizome is a thick horizontal stem, usually at or below the soil surface, that stores energy and sends out roots and shoots.
Root Rot
Root rot is root decay caused by overly wet, low-oxygen soil that allows roots to die and pathogens to spread.
Corm
A corm is a short swollen underground stem that stores energy and can produce new shoots and roots.
Tuber
A tuber is a swollen storage structure that holds energy and can help a plant regrow.
Plant Anatomy
Light & Physiology
Bright Indirect Light
Bright indirect light is strong light that reaches a plant without harsh direct sun rays hitting the leaves for long periods.
Transpiration
Transpiration is the movement and evaporation of water from a plant, mostly through tiny pores in the leaves.
Stomata
Stomata are tiny adjustable pores on leaves that let plants exchange gases and release water vapor.
Soil & Potting
Cache Pot
A cache pot is a decorative outer pot that hides a nursery pot or inner container.
LECA
LECA stands for lightweight expanded clay aggregate: porous clay balls used as an inorganic growing medium.
Pon
Pon is an inorganic plant substrate, commonly made from mineral materials such as pumice, lava rock, and zeolite.
Perlite
Perlite is a lightweight expanded volcanic glass added to potting mixes to improve drainage and airflow.
Sphagnum Moss
Sphagnum moss is a moisture-holding moss used for propagation, moss poles, air layering, and some potting mixes.
Useful Starting Points
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