I think it would look something like this.
They're both a good primary and secondary, just remember to take the key powers and you're good to go. With SoC bunching the mobs up you can follow up with the ISC and the Breath for some nice AoE.
Yep it would look JUST like that 
One of the Regular Dom Team members is a lovely Plants/Ice Aggro-hogging-Tank, amazed sometimes how much damage she can take and dish out.
I myself have a Plants/Ice also, she's a lot of fun, Powerboosted goodness and frozen shards of doom over confused enemies (soon to be trapped in patches of Creepers).
@Drakmarth & @Drakmarth2
Avatar by S. Wall
#415877 - An Uncivil War: Preclude - Looking for Feedback im slightly biased lol but ice/ice works for me :P
lol tht link was awesome. so made me laugh
plant is a nice sweet set for a dom for sure and ice as a secondary is also appently as good, my mt8 told me he got one to 50 and loved it, its even good in pvp.
Plant is now very evil in pvp due to seeds of confusion and the change to how it works in pvp. It's naaaaasty.
Righty then, I've been mulling over making a Domi for a wee while now and for the longest time was stuck between going Plants/Thorns or Ice/Ice.. Both appealed to me for different reasons, and at that point I was all obsessed with 'matching sets'.. But I came to thinking, I love Plants (the flytrap is coolies :P) and I like the idea of Ice Assault..
My curiosity is this, how viable would Plant/Ice be as a build? And can anyone give me an example of how such a build would look at all?
~Celes