Can I throw avocado skins, as is, on a compost pile, or do I need to shred them somehow? Or are they not recommended at all? They are extremely hard.
they'll break down in due course.
Here is a link that might be useful: len's garden page
I've never had any trouble with avocado skins in my compost. Like gardenlen said, the skins will break down eventually.
The skins break down fine. I always cut the pits in half and they will compost . The only part that doesn't compost are those little label stickers they stick on. They stay in the soil for years so those go in the trash.
If you stick the pits in, many of them will germinate in the heap (in summer at least). Same for mango. Nice surprise when harvesting compost.
I throw both pit and skin in the compost as is (with label removed). If they are not done when the rest of the pile is I just toss them on another pile-in-progress.
What it is about those little sticky fruit labels that makes them so indestructible? I still throw them in my compost, because I am stubborn and refuse to be intimidated...of course my garden veggies sometimes have dole bannana lables on them :-)