This is the patio just below the pot full of parsley.  See the baby parsley coming up in the cracks?  It does the same thing in my garden.  In the second year it goes to seed, and those seeds fall off, and start new baby parsley plants.  

 

Grow parsley;  it's very fun:  it attracts black swallowtail butterflies to your garden, it regrows itself, and it is great in the kitchen.  Win/win/win.

 

 

HAPPY GARDENING!!!