Plant SOS · Symptoms
Why are my plant's leaves falling off?
Watching your plant lose its leaves can be stressful — especially when they fall one by one for no apparent reason. However, this symptom is one of the most common in houseplants, and it almost always responds to a clearly identifiable cause. Most of the time, a simple adjustment is enough to stop the fall and restart growth.
In this guide, we review the 5 main causes of leaf drop, with the signs that help distinguish them and the steps to follow for each.
Normal fall or problem?
First of all, it's important to distinguish between natural leaf drop and pathological leaf drop. All plants lose their oldest leaves over time — it's a normal cycle. What should raise an alarm is when leaves fall in large numbers, quickly, or when they fall while still green and seemingly healthy.
"A green leaf falling is more concerning
than a yellow leaf falling."
1. Stress related to relocation
Environmental shock
This is the most common cause, yet the least suspected. When a plant changes location — even by a few meters — it can react by suddenly losing its leaves. This phenomenon is particularly noticeable in Ficus, Schefflera, or Fiddle-leaf fig.
The plant is not sick: it is simply readjusting its foliage to its new light, humidity, and temperature conditions.
2. Over or under-watering
Hydration problem
Imbalanced watering — too much or not enough — can cause leaves to fall. In both cases, the roots no longer fulfill their role of conducting water and nutrients, and the plant sheds its foliage to survive.
3. Lack of light
Insufficient exposure
A plant that lacks light can no longer maintain all its leaves. It begins by losing those furthest from the light source, often the lower or inner leaves. The drop is gradual and is usually accompanied by prior yellowing.
4. Temperature variations
Drafts and thermal shocks
Tropical plants are sensitive to extreme temperatures and sudden variations. A cold draft, an open window in winter, a radiator too close, or even air conditioning can cause leaves to fall within a few days.
💡 Good to know
In autumn, the natural reduction in daylight can cause a slight leaf drop in some plants — even if they are well watered and well placed. This is often temporary and does not require any particular intervention.
5. Pests or disease
Infestation or infection
Spider mites, mealybugs, or fungal infections can weaken the plant to the point where it loses its leaves massively. In this case, the drop is often rapid and accompanied by other visible symptoms: spots, discolorations, presence of insects or filaments.
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Launch diagnosis🌿 Guide written by the Douceur Maison Plant SOS team.
We write practical guides to help enthusiasts care for their houseplants. · sosplantes@douceurmaison.fr