My grandmother had this book; it looked older but I'm not sure when it was published. I don't remember any part of the title, unfortunately. I remember that it had lots of pretty illustrations. In the story a little boy either finds, or plants, a small strawberry plant. He clears a nice little patch for it so that it can grow. As the story goes on, he slowly expands his little garden with more veggies and fruits, because he figures it's not that much more work to add a little more, and then a little more, etc. By the end he has a huge, beautiful garden that he is very proud of, but he realizes he forgot about his strawberry plant! In a happy ending, he finds it back and gives it a nice spot of its own.
Makes me think of A Present for the Princess, but in that story the boy just grows strawberries.
Or this: Myra McGee, Willie’s Garden, 1971.
That should be 1977, not 1971.