The location will also feature a youth center, the BBC reported.
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When Lennon was young, he would jump over the wall of the former children's home in Woolton, Liverpool, to find sanctuary.
Until this weekend, fans were only able to get a glimpse of the gardens through a closed gate.
A Salvation Army spokesperson told the BBC, "John Lennon found sanctuary here as a child and that's exactly what we want to offer by opening the Strawberry Field gates for good."