diff --git a/.cirrus.yml b/.cirrus.yml
index 85f8a2a..4a5d604 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -101,7 +101,9 @@
       always:
         format_script: ./script/tool_runner.sh format --fail-on-change
         license_script: $PLUGIN_TOOL_COMMAND license-check
-        pubspec_script: ./script/tool_runner.sh pubspec-check
+        # The major and minor versions here should match the lowest version
+        # analyzed in legacy_version_analyze.
+        pubspec_script: ./script/tool_runner.sh pubspec-check --min-min-flutter-version=3.0.0 --min-min-dart-version=2.17.0
         readme_script:
           - ./script/tool_runner.sh readme-check
           # Re-run with --require-excerpts, skipping packages that still need
@@ -171,6 +173,7 @@
     - name: legacy_version_analyze
       depends_on: analyze
       matrix:
+        # Change the arguments to pubspec-check when changing these values.
         env:
           CHANNEL: "3.0.5"
           DART_VERSION: "2.17.6"
diff --git a/packages/file_selector/file_selector/example/pubspec.yaml b/packages/file_selector/file_selector/example/pubspec.yaml
index 011d958..ff9d6d0 100644
--- a/packages/file_selector/file_selector/example/pubspec.yaml
+++ b/packages/file_selector/file_selector/example/pubspec.yaml
@@ -6,6 +6,7 @@
 
 environment:
   sdk: ">=2.12.0 <3.0.0"
+  flutter: ">=3.0.0"
 
 dependencies:
   file_selector:
diff --git a/packages/file_selector/file_selector_ios/example/pubspec.yaml b/packages/file_selector/file_selector_ios/example/pubspec.yaml
index 5a2eaa6..175ec6c 100644
--- a/packages/file_selector/file_selector_ios/example/pubspec.yaml
+++ b/packages/file_selector/file_selector_ios/example/pubspec.yaml
@@ -5,6 +5,7 @@
 
 environment:
   sdk: ">=2.14.4 <3.0.0"
+  flutter: ">=3.0.0"
 
 dependencies:
   # The following adds the Cupertino Icons font to your application.
@@ -28,4 +29,4 @@
     sdk: flutter
 
 flutter:
-  uses-material-design: true
\ No newline at end of file
+  uses-material-design: true
diff --git a/packages/file_selector/file_selector_linux/example/pubspec.yaml b/packages/file_selector/file_selector_linux/example/pubspec.yaml
index 912a082..f90d1c8 100644
--- a/packages/file_selector/file_selector_linux/example/pubspec.yaml
+++ b/packages/file_selector/file_selector_linux/example/pubspec.yaml
@@ -5,6 +5,7 @@
 
 environment:
   sdk: ">=2.12.0 <3.0.0"
+  flutter: ">=3.0.0"
 
 dependencies:
   file_selector_linux:
diff --git a/packages/flutter_plugin_android_lifecycle/example/pubspec.yaml b/packages/flutter_plugin_android_lifecycle/example/pubspec.yaml
index e732497..4c97e6c 100644
--- a/packages/flutter_plugin_android_lifecycle/example/pubspec.yaml
+++ b/packages/flutter_plugin_android_lifecycle/example/pubspec.yaml
@@ -4,6 +4,7 @@
 
 environment:
   sdk: ">=2.12.0 <3.0.0"
+  flutter: ">=3.0.0"
 
 dependencies:
   flutter:
diff --git a/packages/path_provider/path_provider_foundation/CHANGELOG.md b/packages/path_provider/path_provider_foundation/CHANGELOG.md
index 17e45d3..7adb04f 100644
--- a/packages/path_provider/path_provider_foundation/CHANGELOG.md
+++ b/packages/path_provider/path_provider_foundation/CHANGELOG.md
@@ -1,3 +1,7 @@
+## NEXT
+
+* Updates minimum supported Flutter version to 3.0.
+
 ## 2.1.1
 
 * Fixes a regression in the path retured by `getApplicationSupportDirectory` on iOS.
diff --git a/packages/path_provider/path_provider_foundation/pubspec.yaml b/packages/path_provider/path_provider_foundation/pubspec.yaml
index 9ceb115..30dd655 100644
--- a/packages/path_provider/path_provider_foundation/pubspec.yaml
+++ b/packages/path_provider/path_provider_foundation/pubspec.yaml
@@ -6,7 +6,7 @@
 
 environment:
   sdk: ">=2.12.0 <3.0.0"
-  flutter: ">=2.10.0"
+  flutter: ">=3.0.0"
 
 flutter:
   plugin:
diff --git a/packages/plugin_platform_interface/CHANGELOG.md b/packages/plugin_platform_interface/CHANGELOG.md
index 0b5a6b6..93e45c8 100644
--- a/packages/plugin_platform_interface/CHANGELOG.md
+++ b/packages/plugin_platform_interface/CHANGELOG.md
@@ -1,3 +1,7 @@
+## NEXT
+
+* Updates minimum supported Dart version.
+
 ## 2.1.3
 
 * Minor fixes for new analysis options.
diff --git a/packages/plugin_platform_interface/pubspec.yaml b/packages/plugin_platform_interface/pubspec.yaml
index 6a4bc48..25189d9 100644
--- a/packages/plugin_platform_interface/pubspec.yaml
+++ b/packages/plugin_platform_interface/pubspec.yaml
@@ -18,7 +18,7 @@
 version: 2.1.3
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: ">=2.17.0 <3.0.0"
 
 dependencies:
   meta: ^1.3.0
diff --git a/packages/webview_flutter/webview_flutter_android/example/pubspec.yaml b/packages/webview_flutter/webview_flutter_android/example/pubspec.yaml
index 0daacb0..0fc0daf 100644
--- a/packages/webview_flutter/webview_flutter_android/example/pubspec.yaml
+++ b/packages/webview_flutter/webview_flutter_android/example/pubspec.yaml
@@ -4,6 +4,7 @@
 
 environment:
   sdk: ">=2.14.0 <3.0.0"
+  flutter: ">=3.0.0"
 
 dependencies:
   flutter:
diff --git a/packages/webview_flutter/webview_flutter_web/example/pubspec.yaml b/packages/webview_flutter/webview_flutter_web/example/pubspec.yaml
index 782817e..4685135 100644
--- a/packages/webview_flutter/webview_flutter_web/example/pubspec.yaml
+++ b/packages/webview_flutter/webview_flutter_web/example/pubspec.yaml
@@ -4,6 +4,7 @@
 
 environment:
   sdk: ">=2.14.0 <3.0.0"
+  flutter: ">=3.0.0"
 
 dependencies:
   flutter:
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/example/pubspec.yaml b/packages/webview_flutter/webview_flutter_wkwebview/example/pubspec.yaml
index 7ccb302..718eb28 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/example/pubspec.yaml
+++ b/packages/webview_flutter/webview_flutter_wkwebview/example/pubspec.yaml
@@ -4,6 +4,7 @@
 
 environment:
   sdk: ">=2.12.0 <3.0.0"
+  flutter: ">=3.0.0"
 
 dependencies:
   flutter:
diff --git a/script/tool/CHANGELOG.md b/script/tool/CHANGELOG.md
index 55b5aeb..34def6e 100644
--- a/script/tool/CHANGELOG.md
+++ b/script/tool/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 0.13.4
+
+* Adds the ability to validate minimum supported Dart/Flutter versions in
+  `pubspec-check`.
+
 ## 0.13.3
 
 * Renames `podspecs` to `podspec-check`. The old name will continue to work.
diff --git a/script/tool/lib/src/pubspec_check_command.dart b/script/tool/lib/src/pubspec_check_command.dart
index 5682ba0..aefa316 100644
--- a/script/tool/lib/src/pubspec_check_command.dart
+++ b/script/tool/lib/src/pubspec_check_command.dart
@@ -5,6 +5,7 @@
 import 'package:file/file.dart';
 import 'package:git/git.dart';
 import 'package:platform/platform.dart';
+import 'package:pub_semver/pub_semver.dart';
 import 'package:yaml/yaml.dart';
 
 import 'common/core.dart';
@@ -29,7 +30,23 @@
           processRunner: processRunner,
           platform: platform,
           gitDir: gitDir,
-        );
+        ) {
+    argParser.addOption(
+      _minMinDartVersionFlag,
+      help:
+          'The minimum Dart version to allow as the minimum SDK constraint.\n\n'
+          'This is only enforced for non-Flutter packages; Flutter packages '
+          'use --$_minMinFlutterVersionFlag',
+    );
+    argParser.addOption(
+      _minMinFlutterVersionFlag,
+      help:
+          'The minimum Flutter version to allow as the minimum SDK constraint.',
+    );
+  }
+
+  static const String _minMinDartVersionFlag = 'min-min-dart-version';
+  static const String _minMinFlutterVersionFlag = 'min-min-flutter-version';
 
   // Section order for plugins. Because the 'flutter' section is critical
   // information for plugins, and usually small, it goes near the top unlike in
@@ -100,6 +117,24 @@
       printError('$listIndentation${sectionOrder.join('\n$listIndentation')}');
     }
 
+    final String minMinDartVersionString = getStringArg(_minMinDartVersionFlag);
+    final String minMinFlutterVersionString =
+        getStringArg(_minMinFlutterVersionFlag);
+    final String? minVersionError = _checkForMinimumVersionError(
+      pubspec,
+      package,
+      minMinDartVersion: minMinDartVersionString.isEmpty
+          ? null
+          : Version.parse(minMinDartVersionString),
+      minMinFlutterVersion: minMinFlutterVersionString.isEmpty
+          ? null
+          : Version.parse(minMinFlutterVersionString),
+    );
+    if (minVersionError != null) {
+      printError('$indentation$minVersionError');
+      passing = false;
+    }
+
     if (isPlugin) {
       final String? implementsError =
           _checkForImplementsError(pubspec, package: package);
@@ -320,4 +355,43 @@
     final String suffix = packageName.substring(parentName.length);
     return !nonImplementationSuffixes.contains(suffix);
   }
+
+  /// Validates that a Flutter package has a minimum SDK version constraint of
+  /// at least [minMinFlutterVersion] (if provided), or that a non-Flutter
+  /// package has a minimum SDK version constraint of [minMinDartVersion]
+  /// (if provided).
+  ///
+  /// Returns an error string if validation fails.
+  String? _checkForMinimumVersionError(
+    Pubspec pubspec,
+    RepositoryPackage package, {
+    Version? minMinDartVersion,
+    Version? minMinFlutterVersion,
+  }) {
+    final VersionConstraint? dartConstraint = pubspec.environment?['sdk'];
+    final VersionConstraint? flutterConstraint =
+        pubspec.environment?['flutter'];
+
+    if (flutterConstraint != null) {
+      // Validate Flutter packages against the Flutter requirement.
+      if (minMinFlutterVersion != null) {
+        final Version? constraintMin =
+            flutterConstraint is VersionRange ? flutterConstraint.min : null;
+        if ((constraintMin ?? Version(0, 0, 0)) < minMinFlutterVersion) {
+          return 'Minimum allowed Flutter version $constraintMin is less than $minMinFlutterVersion';
+        }
+      }
+    } else {
+      // Validate non-Flutter packages against the Dart requirement.
+      if (minMinDartVersion != null) {
+        final Version? constraintMin =
+            dartConstraint is VersionRange ? dartConstraint.min : null;
+        if ((constraintMin ?? Version(0, 0, 0)) < minMinDartVersion) {
+          return 'Minimum allowed Dart version $constraintMin is less than $minMinDartVersion';
+        }
+      }
+    }
+
+    return null;
+  }
 }
diff --git a/script/tool/pubspec.yaml b/script/tool/pubspec.yaml
index abf2a61..a8df2a9 100644
--- a/script/tool/pubspec.yaml
+++ b/script/tool/pubspec.yaml
@@ -1,7 +1,7 @@
 name: flutter_plugin_tools
 description: Productivity utils for flutter/plugins and flutter/packages
 repository: https://github.com/flutter/plugins/tree/main/script/tool
-version: 0.13.3
+version: 0.13.4
 
 dependencies:
   args: ^2.1.0
diff --git a/script/tool/test/pubspec_check_command_test.dart b/script/tool/test/pubspec_check_command_test.dart
index 2c254ca..7a9c0ce 100644
--- a/script/tool/test/pubspec_check_command_test.dart
+++ b/script/tool/test/pubspec_check_command_test.dart
@@ -60,12 +60,16 @@
 ''';
 }
 
-String _environmentSection() {
-  return '''
-environment:
-  sdk: ">=2.12.0 <3.0.0"
-  flutter: ">=2.0.0"
-''';
+String _environmentSection({
+  String dartConstraint = '>=2.12.0 <3.0.0',
+  String? flutterConstraint = '>=2.0.0',
+}) {
+  return <String>[
+    'environment:',
+    '  sdk: "$dartConstraint"',
+    if (flutterConstraint != null) '  flutter: "$flutterConstraint"',
+    '',
+  ].join('\n');
 }
 
 String _flutterSection({
@@ -931,6 +935,163 @@
         ]),
       );
     });
+
+    test('fails when a Flutter package has a too-low minimum Flutter version',
+        () async {
+      final RepositoryPackage package = createFakePackage(
+          'a_package', packagesDir,
+          isFlutter: true, examples: <String>[]);
+
+      package.pubspecFile.writeAsStringSync('''
+${_headerSection('a_package')}
+${_environmentSection(flutterConstraint: '>=2.10.0')}
+${_dependenciesSection()}
+''');
+
+      Error? commandError;
+      final List<String> output = await runCapturingPrint(runner, <String>[
+        'pubspec-check',
+        '--min-min-flutter-version',
+        '3.0.0'
+      ], errorHandler: (Error e) {
+        commandError = e;
+      });
+
+      expect(commandError, isA<ToolExit>());
+      expect(
+        output,
+        containsAllInOrder(<Matcher>[
+          contains('Minimum allowed Flutter version 2.10.0 is less than 3.0.0'),
+        ]),
+      );
+    });
+
+    test(
+        'passes when a Flutter package requires exactly the minimum Flutter version',
+        () async {
+      final RepositoryPackage package = createFakePackage(
+          'a_package', packagesDir,
+          isFlutter: true, examples: <String>[]);
+
+      package.pubspecFile.writeAsStringSync('''
+${_headerSection('a_package')}
+${_environmentSection(flutterConstraint: '>=3.0.0')}
+${_dependenciesSection()}
+''');
+
+      final List<String> output = await runCapturingPrint(runner,
+          <String>['pubspec-check', '--min-min-flutter-version', '3.0.0']);
+
+      expect(
+        output,
+        containsAllInOrder(<Matcher>[
+          contains('Running for a_package...'),
+          contains('No issues found!'),
+        ]),
+      );
+    });
+
+    test(
+        'passes when a Flutter package requires a higher minimum Flutter version',
+        () async {
+      final RepositoryPackage package = createFakePackage(
+          'a_package', packagesDir,
+          isFlutter: true, examples: <String>[]);
+
+      package.pubspecFile.writeAsStringSync('''
+${_headerSection('a_package')}
+${_environmentSection(flutterConstraint: '>=3.3.0')}
+${_dependenciesSection()}
+''');
+
+      final List<String> output = await runCapturingPrint(runner,
+          <String>['pubspec-check', '--min-min-flutter-version', '3.0.0']);
+
+      expect(
+        output,
+        containsAllInOrder(<Matcher>[
+          contains('Running for a_package...'),
+          contains('No issues found!'),
+        ]),
+      );
+    });
+
+    test('fails when a non-Flutter package has a too-low minimum Dart version',
+        () async {
+      final RepositoryPackage package =
+          createFakePackage('a_package', packagesDir, examples: <String>[]);
+
+      package.pubspecFile.writeAsStringSync('''
+${_headerSection('a_package')}
+${_environmentSection(dartConstraint: '>=2.14.0 <3.0.0', flutterConstraint: null)}
+${_dependenciesSection()}
+''');
+
+      Error? commandError;
+      final List<String> output = await runCapturingPrint(
+          runner, <String>['pubspec-check', '--min-min-dart-version', '2.17.0'],
+          errorHandler: (Error e) {
+        commandError = e;
+      });
+
+      expect(commandError, isA<ToolExit>());
+      expect(
+        output,
+        containsAllInOrder(<Matcher>[
+          contains('Minimum allowed Dart version 2.14.0 is less than 2.17.0'),
+        ]),
+      );
+    });
+
+    test(
+        'passes when a non-Flutter package requires exactly the minimum Dart version',
+        () async {
+      final RepositoryPackage package = createFakePackage(
+          'a_package', packagesDir,
+          isFlutter: true, examples: <String>[]);
+
+      package.pubspecFile.writeAsStringSync('''
+${_headerSection('a_package')}
+${_environmentSection(dartConstraint: '>=2.17.0 <3.0.0', flutterConstraint: null)}
+${_dependenciesSection()}
+''');
+
+      final List<String> output = await runCapturingPrint(runner,
+          <String>['pubspec-check', '--min-min-dart-version', '2.17.0']);
+
+      expect(
+        output,
+        containsAllInOrder(<Matcher>[
+          contains('Running for a_package...'),
+          contains('No issues found!'),
+        ]),
+      );
+    });
+
+    test(
+        'passes when a non-Flutter package requires a higher minimum Dart version',
+        () async {
+      final RepositoryPackage package = createFakePackage(
+          'a_package', packagesDir,
+          isFlutter: true, examples: <String>[]);
+
+      package.pubspecFile.writeAsStringSync('''
+${_headerSection('a_package')}
+${_environmentSection(dartConstraint: '>=2.18.0 <3.0.0', flutterConstraint: null)}
+${_dependenciesSection()}
+''');
+
+      final List<String> output = await runCapturingPrint(runner,
+          <String>['pubspec-check', '--min-min-dart-version', '2.17.0']);
+
+      expect(
+        output,
+        containsAllInOrder(<Matcher>[
+          contains('Running for a_package...'),
+          contains('No issues found!'),
+        ]),
+      );
+    });
   });
 
   group('test pubspec_check_command on Windows', () {