Oh, want to see the length of the adeniums? It is short, slightly less than 5 inch. Don't have soda can, put it side by side with a cup, and a tea box with the same height as Coca-Cola can.
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I am also a believer of banana peel. But I always have the peel fermented before using it as fertilizer. Never use it for succulents, only applied that on fruits and other tropicals. It can also reactivate dead soil. I have a plant that grown in a pot for than 20 years, never repot / change media. Until one day I realized the soil can not absorb any water at all, regardless how much water that we put into the pot, the water just get out of the drain holes and the media remains dry. Then I applied the banana peels fertilizer, after the 2nd application, the soil can absorb water already.
The formula that I use:
- use a 15 liters bottle
- 1/3 of banana peels
- 2/3 of water
- 1 spoon of sugar (to feed the bacteria)
- 1 spoon of rice/potato ( need some carbo for the bacteria to grow)
Let it fermented in the shade for 2 weeks to 1 year. Beware that during the fermentation process, there will be a lot of CO2 gas produced, the bottle may explode, I have made special cap to allow slow release of the gas.
Dilute the banana juice with watet 1 : 50 during application.
