The Victory Garden on the Fenway is still there.
What I was surprised to see was the gardens along the rail lines outside of cities like Zurich or Geneva in Switzerland.
People from the cities would rent land plots near the stations out in the Swiss countryside. Right along the side of the rail line. Then they would take the train out to tend their plot.
This was very common when I was there in July 1990.
The other place that is very conscience about growing their own food is on the island of Bermuda. There are 60K+ packed onto an island that is 25 miles long. Wherever there is not a golf course people grow all sorts of vegetables. Even if it is right in downtown Hamilton. Virtually everything on the island of Bermuda is imported.