What is water in Slime Rancher used for?

One of the Vacpack upgrades unlocks a vac tank used exclusively for water. The game seems a little vague on the purpose of this, what can you use water for?

Solution 1:

Water can be used to:

• Damage and destroy the Tarr
• Temporarily stop a Rad Slime's radiation aura
• Destroy a Crystal Slime's crystal formations
• Temporarily stop a Quantum Slime's ability to align with one of its other possible realities
• Snuff out a Mosaic Slime's fire glints
• Temporarily extinguish a Fire Slime's flames
• Power Drones, by watering their flower-shaped station

Despite the game mentioning watering crops, water cannot be used to speed up the growth of plants in a garden. An upgrade, the Sprinkler, fills that role instead.