For what it's worth, I agree with Jim's remarks, and would add only a couple of comments.  

Greens are no only poor at recruiting people of color, but people in general.  I have over 25 years of examples that are 100% demonstrations of this, and I have no real examples of serious efforts to build any kind of ongoing engaged membership.  They want only to go through the motions and aspire only to the kind of passive civic consumerism of voting.

This isn't a great departure from the general course of the Left.  I remember the SWP at its peak knocking itself out to make the signature count and get a candidate on the ballot so they could have a "legitimate" campaign.  I recall one of these that consisted entirely of one public forum attended by only a couple of non-members.  Campaign were usually the same going-through-the-motions ritual.

As to why you have a succession of groups going through this ritual in competition with each other is incomprehensible.

On the broader sense, I have been regularly astonished at the willingness of radical parties to accept their exclusion from the ballot, "debates," and news coverage.  There are so many ways we could respond effectively to this.

But, back to start, that would takd organization and members.  And I don't think those groups that have already repeatedly declined to do this are going to change.

Something new is needed.