diff --git a/src/wp-admin/post.php b/src/wp-admin/post.php
index 291a1a6ac0..3422e1886a 100644
--- a/src/wp-admin/post.php
+++ b/src/wp-admin/post.php
@@ -96,6 +96,14 @@ switch ( $action ) {
 		$_POST['comment_status'] = get_default_comment_status( $post->post_type );
 		$_POST['ping_status']    = get_default_comment_status( $post->post_type, 'pingback' );
 
+		// Wrap Quick Draft content in the Paragraph block.
+		if ( false === strpos( $_POST['content'], '<!-- wp:paragraph -->' ) ) {
+			$_POST['content'] = sprintf(
+				'<!-- wp:paragraph -->%s<!-- /wp:paragraph -->',
+				str_replace( array( "\r\n", "\r", "\n" ), '<br />', $_POST['content'] )
+			);
+		}
+
 		edit_post();
 		wp_dashboard_quick_press();
 		exit;