Rerouting a sprinkler head?

I am going to be rerouting 2 sprinkler heads because we are going to be building a planter over them. I know how to bring them about 1 1/2 feet closer to the lawn, but can I also tee it off and bring up 2-4 additional small heads into the planter without screwing up the water pressure?

Thanks

addition

Yes, No, or Maybe. We have no idea how many heads are in that zone, what your pressure is, what size pipe is feeding the zone, what size pipe feeds those heads.OR what kind of heads you are relocating.