Does SSL Zen issue Wildcard SSL?
SSL Zen does not support Wildcard SSL. It issues you a single-domain SSL for WordPress sites that covers both www and non-www domains (for example www.sslzen.com and sslzen.com).
To know more about the benefits and how to the SSL certificate for your domain using SSL Zen, follow the below links:
WordPress: https://wordpress.org/plugins/ssl-zen/