Advise about Social Sharing between two loosely affiliated website - (retweets/fb cross sharing)

[Southbay_Carnivorous_Plants]

So basically, I have two websites.  One being my Primary website and another which is very Niche/Seasonal.   Now the Niche website received a penalty, and was later re-included however google traffic has been extremely limited since being reindexed. (bing never had a problem, still top ranked)

I don't directly link back and forth between the two websites because its not worth hurting my primary websites ranking.  I'm sure google knows I own both anyway, as they are on the same webmaster tools but the Niche site was kicked for spammy link building & its been an endless process removing them all.

Anyway, with that being my concern.  Would it be acceptable to cross share facebook posts, retweet and do things like that on occasion?  My primary reason for asking is because the Niche website has a very large social following, so I would like to share post/tweets from my Primary site when its relevant and vice versa.

Appreciate any suggestions/comments.  Thanks!

[DennisSeymour]

definitely dont see anything wrong with cross social shares. Not something I would even worry about.

[Southbay_Carnivorous_Plants]

Cool, I sort of thought that would be the case.  I was just concerned because I didnt have dedicated time to develop my niche site, so even thought its been online for 8 years... The penguin penalty was rather severe, and took a full year of cleaning just to be re included.  Meaning I want no association between the two site.

That being said, I can't see how natural social sharing for a few weeks could be damaging to my primary website but I just wanted to check to see if anyone had experience with this specifically.  By that I mean, how social metrics and sharing may impact a website...

I know anytime I get a re tweet or share from a large outlet, I see substantial traffic, and sometimes ranking increases... However have never seen, talked about or noticed the impact of a share from a website like my niche site.  Which has a pristine service record, strong social following but yeah was kicked for a reason.

thx