Having multiple Domains and coupling them with excellent content will always bring you MORE TRAFFIC. Of course you have to not overdo it and simply have the best information possible. THINK carefully what a customer needs and provide it and you will be rewarded.
THERE ARE HUNDREDS OF DIFFERENT CROPS REQUIRING SEEDS. The good info and content is doable if you only organize it and keep at it till its complete. Once the domains and content are in place. You just fine-tune things and never look back because your SEED WEB SITE will always be the best there is.