Testing out Zyra builds as Zyra was my mine midlaner before they nerfed her.
There are two builds Im testing now.
This one uses Arcane Comet because with your Plants they lower its CD by 20% each hit. With a Ult and 3-4 plants you can get 4-5 activates of Comet just with that.
Ill upload a video of the other build with also can be used for support Zyra.