Zara support steals too much CS from ADC

I've been maining as Zyra support for a while now and it's just unavoidable that my plants will end up stealing at least some of the ADC's CS in a game. This can happen either by directly getting the CS myself or just accidentally weakening a creep to a point that it dies too quick and the ADC may miss the last hit. This also causes the lane to be more pushed than it should be.

What I think Zyra needs is a little bit more control over her plants. This could be as simple as adding a way for you to stop your plants from attacking creeps. I do know that if you auto-attack an enemy champion the plants will stop attacking the creeps, but sometimes this means getting too close to the enemy champions and could possibly lead to a death, which just isn't worth it.

In a perfect world I would like something similar to Kindred's marking system. It could have all the the enemies and even a slot that cancels all plants from attacking. I seriously doubt that Riot would implement something like this and it might even call for some balancing work to the plants damage, but I think something needs to be implemented to help Zyra supports from hurting their ADC's.

What do you guys think? Are there any other Zyra supports out there who also have this issue? If not, are there any tips you could pass to me? Also, are there any ADC's that have this issue when their support is playing Zyra?

Thanks for any insight, in advanced!