I have a problem with root maggots in my green onions and carrots. This is the 2nd year I plant my garden, but the first time I plant green onions. I have researched a bit and have already heard that I could try ashes to treat the soil. I have been seriously thinking of starting over (digging up my entire garden area and putting down a fresh load of black earth as well as manure and fertilizer). Any chance that this could eliminate the root maggots as well or will they come back (let's say I don't get all of the affected soil dug up?)
Thanks for any help.