Crossword puzzle clue "she said you can lead a horticulture but you can't make her think"

She said "You can lead a horticulture, but you can't make her think"

Nevertheless, she asked him if he had attended her high school, and after he said yes, she asked "...?"

It's said that he said, "I never said most of the things I said"

The "she" in the lyric "I'm not the world's most physical guy, / But when she squeezed me tight she nearly broke my spine"

Activist who said "You can kill a man but you can't kill an idea"

Part of a horticulture series?

Practiced horticulture

Horticulture