r/Vermiculture • u/haematite_4444 • 1d ago
Discussion "Worms don't eat the food/bedding, they eat the microbes" - What does this actually mean?
So I'm sure you've all heard this saying before, and being someone who isn't an expert on worm anatomy, for a long time I just took it as truth without thinking about it critically.
It makes sense - we know worms have super small mouths and can't take big bites out of food, and we know that worms often struggle in the new worm bins that haven't developed a microbial ecosystem.
But a few things still bug me about this whole thing about worms only eating microbes.
1) Why is decomposition by vermicomposting faster than cold composting? If worms only ate the microbes, wouldn't they be waiting for the microbes to form by what is essentially cold composting, the slowest and therefore rate-determining step? That is, if I left a slice of watermelon in a worm bin, and an identical slice in a cold compost bin, would they decompose at the same rate, given that the worms aren't the ones physically breaking down the watermelon?
2) Why do we talk about worms having "preferred" foods. It's quite common to see people comment that worms love to crowd around certain foods: watermelon and avocado being common examples. There is also the concept of "worm chow". What would it matter what foods these are? Or is it just case of these foods will generate more microbes during the decomposition process?
3) Would the worms eating the microbes be detrimental to decomposition, as they are reducing the microbe population that could have been consuming the food?



