Living in SoCal, in a 60's homethe prior owner(s) of which planted 'lowmaintenance' largeleaf ivy Everywhereand proceeded to neglect itI'm faced with the dual garden headaches of mostly dense clay 'dirt' that was almost devoid of nutrients.Helping a firsttime homeowner who's 'clay dirt' situation is as Bad as mine, I had to believe that there Has to be a Better way to penetrate adobe than hoeing in agricultural limeas I did helping my Dad in the early '60s to address the 'hardpan' dirt around my childhood home.Several 'Down the Rabbit Hole' searches of the 'InterWebs' all led to the same solution: A watersoluable 'solution' containing humic acid (whch puts the "Huum" in humus).The "FARMER'S SECRET" brand poppedup in a couple of gardening magazines websites(*); the product is used by HonesttoEarth Farmers, it was sold thru Amazon with high ratingsand the small bottle was an affordable way to try it out.It Exceded ALL expectationsand most Hopes, too.It revived 4 neardead inground bougainvilla vines & a struggling Star Jasmine. It restored deep green color to 4 of 6 potted citrus trees (I'm retreating the other 2), and invigorated a dozen Alpine Strawberry plants in their 3rd years in the same pots !It's as black as coal, mixes completely with water (give it a good shake before dispensing) in wateing can & sprayer, is somehow odorlessAND Somehow, IT WORKS !