Intruder alert(s) EXTERMINATE!©

       When the Broccoli is done this will be the "Thornless Blackite" Patch.  Meantime I see numerous growths closely resembling Cherries.
       They're NOT from pips for two reasons:-
1.  I am sure I'd have seen so many Cherries &/or pips on the weed-free surface.
2. They go way too deep and when fiercely pulled are woody far too deep.
      I'm wondering if the cherry tree Stock (Presuming a graft) is sending up suckers all over the garden (as seen)