Shrek, being a creature of the swamp, likely has his own unique way of tending to his plants. Here's a whimsical take on how he might water his greenery:
Shrek strolls through his lush, murky swamp, surrounded by all sorts of odd and magical plant life.
He carries a bucket that's nearly as big as him, filled with water from the swamp's edge. After all, why use plain old tap water when you have swamp water readily available?
Shrek reaches his beloved garden of unusual swamp plants, giving each one a personal greeting, as he believes in treating all living things with kindness.
With a hearty "Ogres are like onions!" he pours the swamp water over the plants. They seem to thrive under the nourishing touch of their swampy guardian.
Shrek may pause to tell Donkey or any other swamp creatures nearby some interesting tidbits about his botanical friends.
If he encounters a particularly stubborn or mysterious plant, Shrek might have a brief conversation with it, asking if it's having a good day or sharing his swamp wisdom.
Sometimes, he'll even sing to his plants, and the melodies of his ogre lullabies are said to have a magical effect on the swamp's vegetation.
After ensuring that all his plants have had their fill of swamp water, Shrek stands back to admire his handiwork, a satisfied grin on his face.
He returns the bucket to the swamp's edge, thanking the water for its contribution to the well-being of his plants.
As Shrek continues his journey through the swamp, he knows that the flora in his garden will continue to thrive under his loving care, reminding him that even ogres have a green thumb or two.