If you need support from Yola please contact us via firstname.lastname@example.org or make use of our live chat service! We are working on a new approach to community-based support and during this transition period we are not adding any new threads to this forum. Many thanks to everyone who has participated over the years and we look forward to unveiling a new peer-to-peer support system soon!
The Silver hosting subscription you refer to allows you to create 25 customised sites each with their own custom domain if you wish. The domains themselves are separate entities and require that you purchase these separately. The domains are not included with the Silver hosting plan. So if you haven't already purchased myerbgarden.com you would need to do so to publish a site to this custom domain.
You may also publish any sites to Yola subdomains and these are free.