You need an RF Choke for your otherwise buried lead-In to your QTH in HOA Occupied Territory,
as your final move, but burying it MIGHT change its characteristics(you never know until you try), and you're in an RF bind...
So In your bag of Stealth Antenna Tricks, you might consider including: Some clear glass Marbles, and some astroturf. Neither costs much. So just dig a little hole behind the shubbery (hope it's HOA Approved shrubbery, because some HOAs only allow you to plant certain plants... Yep, more HOA ridiculousness, but in some places, it's a Thing.) and place the choke there. Now, pour in the beads all around the choke, and place a bit of some astroturf above that. And a thin layer of dirt/mulch, if you need that. And some of those stupid plants, or maybe some plastic "leaves", twigs, whatever. Yep, your're all set! Keep the weeds away, and just blend it in...You don't want anybody reaching down there and hitting paydirt to pull a weed...
All the Best!
73 DE W8LV BILL