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Keep working at it. Make your own mulch and compost. Sometimes it takes a few years of "no chemicals" to bring your soil microorganisms to life. They unlock much of the soil goodness!!
All the best!!

Thanks for the advise @healthy-home. Will do

Lol. Yes. I have a couple submitted that need tweaking.....but yes. It is long overdue!!! XD

Have u tried to combine your backyard's soil with gardening soil? Maybe it can help to fertile the soil..

Unfortunately I did.