Question: To prevent diseases on seedlings.
Options:
Cinnamon has some anti-fungal qualities, and it smells great as a bonus. Sprinkle it on plants to  prevent and spread diseases on seedlings.
Cinnamon has some anti-fungal qualities, and it smells great as a bonus. Sprinkle it on plants to  prevent and stop diseases on seedlings.
Answer: Cinnamon has some anti-fungal qualities, and it smells great as a bonus. Sprinkle it on plants to  prevent and stop diseases on seedlings.