The greenhouse is atop the tallest building on Balding Avenue, and the third spy is being held captive there. You will need the grappling bowtie from the second spy in order to reach the rooftop above the Grease Monkey garage.
(see the related question)
On top of the highest building.
There is no greenhouse on Spy Island.
The greenhouse is atop the tallest building on Balding Avenue, and the third spy is being held captive there. (see the related question)
you go back to the bottom and exit the shoot thing
The Venus Flytrap plants will attack you in the greenhouse on Spy Island. Avoid them by jumping on the other hanging plants instead.
He means to shoot the bowtie over to the antenna on top of the building to your right, where you will enter the greenhouse.
Go farther left to the red building, climb the tower, then grapple back to the right to reach the antenna where the greenhouse is located.
You have to find the third agent. She will give you the goggles and the last password clue.
Rescue the third spy by opening the cage in the greenhouse atop Balding Avenue. She will give you the Ultra Vision Glasses. (see the related question)
yes, she is at the top to free her get the cherry bomb (the plant all the way right) but move fast 'cause the fuse is short. DON'T FORGET!
You get the ultra vision gogles (which can see lasers) when you rescue the third spy, from the greenhouse in the rooftops above Balding Avenue. (see related question)
you go through the tube thing and then go to the ground and the rest you will find out along the way
Spy Island is island #6. After Spy Island is Nabooti Island #7