It started growing in one of the pots, but I have no idea what it is. It doesn’t look like a weed even though it’s growing at full sun and 90+ degree weather.
1Some more information would be helpful. What part of the world are you in? Did you grow anything in these pots before? Where did you get the soil/potting mix from? Does the plant have an odor? Please use the edit link to add the information to your post.– cskSep 26, 2020 at 16:59
According to plantnet, this seems to be Peperomia pellucida. Please double check, especially if you try to use it as food (even better: triple-check it).
Based on the "rat-tail" like flowers it certainly is a Peperomia of some kind. Dec 17, 2020 at 13:36