Plants cannot tell you what is wrong, but they show it. Learning a few common signals turns a worrying yellow leaf into useful information.
Start with new growth. A healthy plant keeps producing leaves of normal size and colour. Small new leaves, slow or no new growth, a leggy look and a plant leaning towards the window usually point to too little light. Pale, bleached or faded areas and brown, brittle patches suggest too much.
Next, look at the leaves and the pot together. Wilting, potting mix that is dry to the touch, browned dry leaf tips and a pot that feels light when lifted suggest the plant needs water. Old and new leaves falling at the same time, mould on stems or leaves, or a foul smell suggest the opposite: the roots are too wet. Extension services name overwatering as the main cause of houseplant death.
One mark on one leaf is rarely a crisis. Look for patterns: which leaves, how many, and what changed recently. Later units go deeper into each of these problems.
Key points
- New growth is the clearest sign of how a plant is doing.
- Leggy, leaning growth suggests too little light; bleached patches suggest too much.
- Wilting with dry mix means thirst; dropping leaves and a foul smell with wet mix mean too much water.
Try this
Lift the pot of one plant right after watering, and again a few days later. Getting a feel for the difference in weight is one of the easiest ways to judge dryness.
Check yourself
Read more in the reference
Sources
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