The first one looks like 'sweet william' before it gets flower buds. ? If its not a bother... I would let it grow to maturity and see if it flowers again.

Often called/mistaken for fireweed (and closely related) but most likely Epilobium ciliatum or northern willowherb. Probably one of the most prolific weeds of both gardens and containers in the PNW. Appears almost overnight and grows with the speed of light. "weeds are never those plants native to a given area" Not precisely true :-) Botanically speaking, a 'weed' is any plant that is not valued where it is growing and is usually of vigorous growth, especially one that tends to overgrow or choke out more desirable plants. Many native plants are considered weeds in more highly cultivated gardens or in areas of commercial agriculture. 'Noxious weeds' are a bit different.....they do tend to be hitchhikers or imported exotics and are true invasives. Typically they are listed as of economic concern, either in the cost of their eradication or their impact on agriculture.

https://www.houzz.com/discussions/5908351/invasive-plant-id-growing-in-nj-right-now#n=0 is this the same plant?

Fertility and sterility in plants refers to whether or not they reproduce sexually. This is not sexual reproduction, this is stems growing from roots.