Autumn flower care: fatten them up for autumn, pour a little oil in the pot, and the leaves will be glossy green and grow tall

One autumn rain, one chill; after several days of overcast weather, the usual muggy heat has changed, but the flowers' growth still shows no improvement! What to do? Summer is over, and it's time to fatten them up for autumn! Feed the flowers a little oil, and they are sure to grow tall and big!
So today Yatou will still use the clivia as an example:
Where the oil comes from
Sticking to the consistent style of flower growers, absolutely never waste anything! So the oil fed to the flowers is all waste oil accumulated over time. For example, from a range hood; if you have other channels for collecting it, that works too, though Yatou does not know of any!
How to use it
Collect the waste oil from your home's range hood. Also, peanut oil that has been kept at home for a long time, with just a bit left at the bottom of the container and clearly spoiled, can also be used.
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Find a wooden stick about the thickness of a finger, poke a few small holes around the flower pot, not too deep. Then pour the oil in.
As time passes in the soil, edible oil will slowly decompose and release nutrients. And the fermentation of waste oil will last for a period of time. The clivia happens to like oil crops very much, and after use its leaves will become more and more glossy.
If it is your first time using it, it is hard to avoid getting the force of digging the holes wrong, so you can make potting soil separately.
Find a flower pot filled with soil, do not plant flowers in it yet, dig a hole in the center, bury the waste oil in it, and if conditions allow, you can stir it a bit! Then put it in the sun, cover it with a bag, let it ferment, and expose it to the sun. After about three months, it can be used directly for planting flowers!