We knew the plant was there, but didn't know its hours of operation.

"I don't think anybody other than maybe some of those that really knew the plants knew the potential hazard inside."

This is how many plants know when to flower.

Insects and plants know just what time of year it is without calendars.

Even plants know how to attack other creatures and defend themselves.

The first plant he got close to would've known it'd been in a fight, but the monsters were the size of oxen.

No other plant of high altitudes knows its business so well.

Outside, it was twilight, and the plants knew instinctively where to turn.

This plant looks like a small daisy and just doesn't know when to quit.

"The local plants and animals should know where they are, however."