Display all child categories and posts within that category

Hi All,

I picked this code up from a poster here and like a dummy didn’t save the thread. This code does exactly what I want it to do: display a list of children categories and their respective posts. However, it only shows the most 5 recent posts and I want the code to generate all posts.

I could map it out manually, but this system needs to be dynamic. Any advice on how I can change this code to display all posts?

<?php $cat = 'Writing';
                $catID = get_cat_ID($cat);
                $subcats = get_categories('child_of=' . $catID);
                    foreach($subcats as $subcat) {
                    echo '<h3>' . $subcat->cat_name . '</h3>';
                    echo '<ul>';
                    $subcat_posts = get_posts('cat=' . $subcat->cat_ID);
                    foreach($subcat_posts as $subcat_post) {
                        $postID = $subcat_post->ID;
                    echo '<li>';
                    echo '<a href="' . get_permalink($postID) . '">';
                    echo get_the_title($postID);
                    echo '</a></li>';
                    }
                    echo '</ul>';
                    } ?>