Mushroom compost is used a lot for gardens but it comes with a warning, don’t use too much because it contains a lot of salt. I have been aware of this for a long time, and I have even cautioned people about using too much. Salt can harm plants and it only makes sense not to use a product loaded with salt.
I always wondered why mushrooms would be grown with high levels of sodium. Are the fungi that different from plants? Do they need high sodium levels? A little online research started to make things clear. It turns out to be a good example of the confusion caused between salt and salt – something every gardener should understand.
