This plant started growing this spring in my back yard in Arizona. It is now a few months later and the plant is about 4 feet tall.

Can someone tell me what this is?

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  • It's a weed, or a wild flower, depending on your point of view; can't remember its name, but anything that grows that fast is usually a weed. If you planted wild flower seeds at some time, it may have been in the mix. Hopefully someone else will remember its name...
    – Bamboo
    May 26, 2017 at 16:38
  • Do you remember any flower on this guy? I think Bamboo is right that this was part of a 'wild flower' garden. Couldn't find an Arizona weed to match. My guess is Penstemon...but Aster just might...why did Diane's answer get 'deleted'?
    – stormy
    May 26, 2017 at 20:55
  • Did not see Diane's answer. As to wild flower i hope it looks like either you mentioned. No colors yet just the green leafy stalk.
    – Bob
    May 26, 2017 at 23:04

1 Answer 1


This appears to be a healthy horseweed (Erigeron canadensis). A noxious, roundup resistant, drought resistant annual weed. They can produce over a million wind dispersed seeds per plant, and the seeds can persist in the soil for a long time.

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