Photo would help
Sorry LB but they look like weeds to me. Wait and see what others say
can chillies grow from seed unprotected in the garden? I've tried growing various from seed in the greenhouse with little results.
I've alway thought chillies need a germination temp' of around 18- 20C.
Not an expert as I grow every other year and freeze them. I've germinated in the house in late March / April and potted on and then put in GH before putting on a sunny patio.
Nor me, the rest of my chillies are in my little greenhouse, these I just slung in some soil and put in a corner (heat trap) in the garden and left them too it.
But this is what has popped up? I have now moved them onto individual pots as I have reused the hanging basket for more strawberries.