It might help to identify what kind of corn you have. That said, it doesn't look very good for your corn. Is it pale yellow or deep green?

It's deep green. It's called Heritage Corn Extra Sweet. It's supposed to be one of the most cold hardy varieties according to the package.

I tried to google that variety and can't find it. If it's a super short-season corn like Polarvee, it may be normal to start tasseling that small, being that it barely reaches 4' tall at best.

When did you plant it?

Also, can you verify the exact name of the variety from the packet? Was it by chance one of those 10 or 20 cent packages of cheap seeds? 'Heritage' may just mean it some unnamed open pollinated variety.

It's from Heritage Garden Products in Manitoba. It costs around $4-5 CAD.

I planted early June, but it was cold until mid July, then it became more normal.

Heritage Garden Products doesn't seem to have a web page, so I can't look up the characteristics of the variety of corn you have. It is possible your corn was stunted by cool weather, but at this point I guess you just let it play out and see if you get any corn. Side dress with a nitrogen rich fertilizer if you haven't done so already.