There are several items that should never go into your compost bin. I've talked briefly about this in other sections but now I'm going to get into it.

Here's 8 materials that should never go into your compost pile:

Diseased or insect-infected plants

Pet waste

Meat and animal products

Plants that spread by rhizomes or roots

Weeds with seeds on them

Poisonous plants

Fat, grease or oils

Dairy products

Why can't these items go into your compost pile? Well, you want clean items that are going to break down easily.

Diseased, infected or poisonous plants are going to infect the future of your garden spot. So, you definitely don't want to make an organic matter out of those materials.

Meat and dairy products as well as fat, grease or oils are not going to break down well. So, they will just be a mess.

Finally, pet (and human) waste is not good for your compost pile either.