I have a patch of ajuga in between some raised beds. I actually had tried to grow it in a bed, and it never took, but somehow sprouted up in that path and took off. I leave it there because it's pretty, can seem to take some walking on, and seems like a pretty good weed barrier. For that last reason I'm not sure how things would reseed, although I've never actively tried. I do get an occasional weed that I have to pull there (mostly peanut vine which was introduced to my garden through some llama/alpaca manure I used to get from a farm).

You can see how few weeds are here - and trust me, this is NOT a well-attended to part of my garden lol!

A house a few miles from me has a huge patch of it in their front lawn. Has to be at least 30 by 20 feet. It's spectacular in spring. I never see anything growing in it, but don't know the reason - do they weed? Do they not grow anything there because it's the middle of the lawn? etc.

I should add that my zinnias never ever reseed for me, so I doubt they would ever reseed in my ajuga. But that's just my experience.

FWIW some will warn you off ajuga at all. In my experience, the variety makes a difference. I've tried a few (can't quite remember the names) and none really took off in my garden beds. While this patch somehow got started on it's own, a good 30-40 feet from where I tried to grow it, it's taken about 12-15 years to get to this point, so again, in my experience, it's not super aggressive. But others may have horror stories. Just something to keep in mind.

Good luck!

:)

Dee

Ajuga and zinnias like different growing conditions, so don’t think they are a good combination. I don’t have experience with reseeding annual zinnias, but if you have a place where you truly want ajuga, you could try combining with spring bulbs, or a perennial.