What are these things growing in my garden box?

They look like jelly fungi

They are probably some sort of mushroom fungus whose spores in the soil have been activated by watering. Maybe what @thorninmud posted. Kinda cool…nature has a way of surprising you. I JUST came in from wandering around my yard and found some baby Blackberry plants that have materialized on the edge of my yard, hill. Courtesy of the birds no doubt. I’m going to let them grow. :-)

They appear to be mushrooms.

A common small yellow mushroom that grows on house plants here;

@gailcalled That’s what they look like exactly. Looks like they’re harmless, but I’m not sure how my coworkers will react to a bunch of bright yellow mushrooms hovering over their desks.

Type the data on a small card and attach to plant. Treat it like an exhibit at the arboretum.

@RocketSquid

Tell them they are a rare south american hallucinogenic mushroom and they best be nice to you or you’ll slip ‘em a shroom in their coffee. lol