In 1.4.4, beating the mechbosses causes a bulb to spawn. I feel that a manual plantera summon would take some of the creative awesomeness away from the boss.
Of course, I've had. I still dislike the search, but the whole idea is that Plantera is supposed to be the hardest boss that follows the game progress (excluding Moonlord and Pillars). It's only natural to make it's finding unique and also hard
There is only one reason you can't...
*Planterra has awoken*
One second later
*Player has been ripped to shreds by Planterra*
[because of the thing about underground jungle]