We planted some spinach last year, they grew, we harvested them and died since they were out of season. But as we speak I checked the garden and these grew in place of them, Bird's Nest Fern is what they're called apparently and I'm wondering if they're edible or not since they were planted from the spinach seeds we sown last year. Thanks in advance for the help!
since there's a lot of talk about plant ID apps: Please for the love of god don't use anything other than iNaturalist/Seek (basically the same thing), these apps are developed together with actual biologists and configured to be very very conservative about the ID they give you, so it doesn't give false positives.
A lot of the time it will just say something vague like "family Amaranthaceae", rather than forcing a more specific and incorrect answer, which is SUPER important!
iNaturalist also includes the ability to post your observation to their database, so other people can look at it and suggest their own identifications, which you can actually somewhat trust.
NEVER eat something just because your phone told you it was safe, that is how you die painfully.