flutter column min height screen sixe
import 'dart:math'; // for max function
// Add the following around your column
LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
return SingleChildScrollView(
child: ConstrainedBox(
constraints: BoxConstraints.tightFor(height: max(500, constraints.maxHeight)),
child: Column(), // your column
),
);
},
);