Put these unwelcome guests to work and let them tell you what's wrong with your garden.
More in Outdoors
There's nothing more frustrating than walking into your backyard only to see the volunteer plants (the weeds) doing better than the ones you signed up for the job. The good news: Those uninvited guests can tell you just what's wrong with your garden. Even though such a "diagnosis" isn't an exact science, weeds can reveal some soil problems if you know what to look for.
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