I am always at a loss where to store onions for the same reason - plus I just don't like the idea of the smell of the onions permeating other vegetables and fruit. But as for potatoes, I have a 3-tiered wire hanging basket which hangs from a hook in the ceiling - I put potoatoes in one of the baskets, and usually lemons and limes in another and other fruits/veg in the third (I often had tomatoes in it over the summer). I have thought about just using that basket for onions and garlic, but I only keep a few of each on hand and seems like it would be a waste of space.

We keep both of them in the refrigerator, sometimes in the pantry or on the counter in a brown paper bag. The potatoes sprout very quickly and I cut the sprouts and green parts off.

I keep both of mine in the same drawer. We go through each fast enough that sprouting has never been an issue

I keep onions in the fridge. Potatoes in a cabinet.

Growing up we kept 50 lb boxes in our basement (my parents were Irish - go figure!). We rarely had them go bad. Dark and cool is the way to go for sure.

We keep onions in a kitchen cabinet and potatoes in the pantry. Just someplace cool and dark for both.

I have pretty much no storage space in my actual kitchen, absolutely everything except my everyday dishes is stored in a small walk in pantry. I know you aren't supposed to store onions and potatoes together since the gasses from the onions will make the potatoes sprout, but how far apart do they need to be? I just don't see how I can keep them that far away from each other in my pantry.

Any thoughts or suggestions are most appreciated, I'm tired of throwing out my potatoes before I get around to using them.