The plant that was loved too much

A child learns that plants need water, applies the lesson enthusiastically, and the plant starts dying. This one catches adults too.

Morning, noon and evening, every single day. The leaves turn yellow and droop anyway.

Nothing is missing here. Every single thing the plant needs is present. One thing is simply wrong, and it is the amount.

Roots breathe

This is the fact that makes the whole thing click, and most people have never been told it.

Roots do drink water. Roots also take in air, through tiny pockets between the particles of soil. Those air pockets are as necessary as the water.

Water three times a day and every pocket stays permanently full. The roots cannot get air. Roots that cannot breathe cannot do their job, and leaves fed by drowning roots turn yellow and droop, which looks for all the world like thirst.

Which is why people water more

That is the trap. The symptoms of too much water look very like the symptoms of too little. So the natural response to a drooping plant is another glass of water, which makes it worse, which produces more drooping.

It is a genuinely nasty feedback loop and it kills a lot of houseplants.

The test that settles it

Push a finger into the soil. Dry as far as the first knuckle? Time to water. Still damp? Leave it another day.

Cheap, immediate, and it replaces guessing with a measurement, which is the actual lesson.

The answer

Show the answer

In the puzzle, what is wrong is: the amount of water.

It is one of the few cases where nothing is missing and nothing has been added. The child has to accept that a correct ingredient in a wrong quantity is its own kind of fault.

Talking about it afterwards

• "If the leaves droop when it is too dry AND when it is too wet, how could we tell which one is happening?"
• "What else needs the right amount rather than the most possible?"
• "Why do you think more of a good thing is not always better?"

Worth doing together with an actual plant and an actual finger. The measurement is the point.

Cases like this one

• The tap that tingles — the part is wrong
• What to put on a burn, and what makes it worse — the part is wrong
• A smell of gas: what to do, in order — the order is wrong

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