Hi, thin them out. Beets and radishes don't like to be crowded at all. I know, it's tough, hate to pull those healthy looking sprouts but it's gotta be done if you want them to bulb out. The more room you give them, the bigger they get and quicker. I've found that you can squeeze in a few extra by staggering the row, you know, like in a zigzag pattern. Makes the row wider but more dense without crowding the beets. Some folks just throw the seed out willy nilly and rake the soil even. Then thin out to a three or four inch spacing in a bed when they sprout. Best of luck.

Helenium amarum (Bitterweed)? Helenium varieties in Virginia.

Unfortunately, with no green plant material to work with, it's almost impossible to say which species of Matelea it is for sure. Some species climb, and others are prostrate., and there are other differences. You can look at the entries on this i. nat link to see if any observations were made in the area you found this pod. That still doesn't mean that it's M. biflora. There could be other Matelea species nearby. Nice pictures in the link! And, perhaps there are no people making observations in that area also? Did you collect any seeds? You can grow them, and then have it ID'd? Maybe someone can ID Matelea pods, but I can't https://www.inaturalist.org/observations?place_id=18&taxon_id=165186 Milkweed maps created by Brad Grimm. Thanks Brad!🤠Matelea biflora Matelea baldwynianaHello, goodbye.

Yes, Late Boneset (Eupatorium serotinum), thanks!!!