Stems that are becoming long, thin, and sparse with wide gaps between leaves are a sign of etiolation, which is a plant's response to insufficient light. When a plant does not receive enough light to support compact growth, it redirects energy into stretching its stems in the direction of the light source in an attempt to find more. The result is long internodal gaps (the distances between leaf attachment points), leaves that are smaller and paler than normal, and a generally leggy, stretched appearance. The fix requires improving the light source, not changing watering or feeding.
What Is Etiolation and Why It Happens
Etiolation is driven by the plant detecting insufficient light through photoreceptors in the stem tips. In response, the plant accelerates stem cell elongation, producing longer internodes in each growth cycle. The plant is prioritising reaching a better light source over producing dense, healthy growth.
In UK homes, etiolation is most common in winter when day length shortens significantly, in north-facing rooms with limited natural light, and in plants positioned more than 2 metres from a window.
How to Fix Etiolated Growth
Move the plant to a position with significantly better light: closer to an east, west, or south-facing window, or directly on the windowsill. In winter, this may still be insufficient, and a grow light is the most reliable solution for maintaining compact growth year-round.
Our grow light range includes both the GrowGang Pianta V2 provide full-spectrum light equivalent to bright indirect daylight regardless of season or window orientation. See our guide on grow lights for houseplants for sizing and positioning guidance.
Moving the plant to better light stops future etiolation but does not reverse the leggy growth that has already occurred. Etiolated stems stay stretched and do not compact once light improves. New growth will showcase better results.
Whether to Prune Back Leggy Stems
For most foliage houseplants, pruning back leggy stems to a leaf node where the growth looks healthy is the most practical way to restore a compact appearance. The plant will produce new stems from the cut point, and if light conditions are now adequate, the new growth will be compact and healthy. Cut back to just above a node (the point where a leaf joins the stem). The trimmed sections can often be propagated as cuttings. See our full guide on how to prune a leggy plant for the process.
Plants with a single growing tip cannot be pruned in the same way without removing the only active growing point. For these, improving the light is the primary option, and accepting that the stretched stem is part of the plant's history is necessary. New growth from the top will be compact if light improves.