I think having its own category on the main page would encourage more journals. To me, personally, are the most useful part as you get to see the nuances and trials and error, tips, etc. that help us tremendously.
I agree 100%. I read the new growers, indoor, LED forums looking for questions, answers, etc. They're often full of grow journals which (to me) broadens the scope of the forum and makes it harder to keep up with more conversational topics.
There could be a grow journal forum with sub-forums for the more specific realms that a grower may be demonstrating.
Or, vBulletin has a customized feature to "tag" posts with a value. A "grow journal" forum could use that feature so a grower could tag their journal as LED, Indoor and Hydro. (I.e., why should it be either/or?).
It's just a matter of organization. Instead of piling grow journals into topic-based forums, concentrate them into a journal forum which could have the same sub-sections.

