Why I don't use third-party compost...

Hundreds of Victorian home gardeners angry and out of pocket after using toxic compost from major recycler Suez

Some time in October last year, a batch of commercial compost left a Suez recycling facility in Melbourne, bound for garden centres in central Victoria and Melbourne.

Within days, it had been combined into soil mixes, and sold to backyard gardeners planting their summer veggie crops.

Within weeks, many of those crops were dying.

Full article:  https://www.abc.net.au/news/2021-02-14/toxic-garden-compost-kills-vegetables-victorian-gardeners-angry/13152164

Even with organic compost/soil, I usually find myself regretting the purchase. 4/5 types of organic soil/compost I've bought recently had plastic bits and fruit sticks and even chunks of cups and other junk in there. The company obviously did not sort the food scraps/compost material they received, and so there were tons of plasticy bits. I spent so much time sifting it and trying to pick out all the plastic, and even still I'm sure there's a lot in it. So depressing!