Your yard may well have shown up on reconnaissance satellites already.
Russians:
"Vut haf zey DISGUISED as an improbably-dense tomato patch?!? Missile silos?"
Chinese:
"Maybe we can steal some high-density gardening tips from this top-secret round-eyes' agricultural research center!"
NSA:
"We've planted secret microphones but we STILL can't catch those tomato plants plotting to overthrow Monsanto!"
