After you have used the robot crab on the golden thing that is hot, when the big plant monster come out of the tubes, use the old vine and it will tangle the monster. then your free to continue. Make sure your right next to the monster.
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Ontop a building left of main street
Hi, You use it to pull a pipe of hot steam down to blast a plant/dragon thingy.
You use the old vine to pull the pipe off and it will blow the hot steam onto the plant, killing it.
you will find a old vine on top of the green house then go back down the hot thing again and go to your items and hit use on the old vine then it will go on the hot steam pipe and it will break open and kill the plant
click on a vine, rocks, a wall
you use it to defeat a vine monster
you fight the monster under the hub
I think you use it for the shark.
The old vine is on the roof of the Storeroom building left of the Living Quarters. Use the steam exhaust fan to lift you to the roof. You will need the vine underground at the Hub.
Climb up the vine (beanstalk) from the restaurant on top of Poptropica Towers (the bouncy laundry lines can get you up there).
use the old vine to pull down the pipe