Chapter Three
Water less than feels right
Most houseplants do not die of neglect. They drown. In your first week you will water less than feels right, and the plant will be better for it. This is the hardest habit to build, because watering is the one thing that feels like caring, and doing less of it feels like doing less for something you want to keep alive.
Here is what is actually happening under the soil. Roots need air as much as they need water. A pot that stays wet has no air in it, and roots sitting in airless, saturated soil begin to rot within days. Rot does not announce itself. By the time the leaves yellow and drop, the damage is a week old and mostly done. The plant that looks thirsty is very often a plant that has already drowned.
So before you water anything, check. Put a finger two knuckles into the soil. If it comes out damp, wait another day, then check again. If it comes out dry and clean, water thoroughly — until it runs from the drainage hole — and then leave the plant entirely alone until the next time your finger says otherwise. Thorough and infrequent beats little and often, every time.
This is also why the watering schedule you were given with the plant is close to useless. A schedule cannot know that your flat is colder in February, that the radiator came on last week, or that the plant has grown into its pot and now drinks twice what it did in spring. The finger test knows all of those things without being told.
Light is the other half of the answer, and it is the half people underestimate. Our eyes adjust so smoothly that a room reads as bright when it is delivering a fraction of the light a plant needs. A pot three feet back from the window receives a small share of what it would at the sill, and a plant in low light drinks far less — which means the same watering routine that worked on the windowsill will drown it two steps away.
If a plant is struggling and you cannot work out why, move it toward the light before you change anything else. More light, less water. That order matters: a plant in brighter light will use what you give it, and the watering problem often solves itself.
One more thing worth saying plainly, because nobody says it. You will kill some plants. Everyone does, including the people whose flats look like a botanical garden on the internet. The difference is not that they have a gift. It is that they have killed enough plants to have learned what each one looks like a few days before it dies, and they act then rather than after. That knowledge only comes one way.
Rule of thumb: dry soil forgives, wet soil does not.