Filed from 3 published puzzles

FERTILIZER

Set to 3 different clues across 3 published puzzles, most often “Yield booster” — The New York Times, Tuesday, 5 April 2011.

10 letters

Every clue on record, most used first

Yield boosteronce
The New York Times — Tuesday, 5 April 2011
Garden enrichmentonce
The New York Times — Tuesday, 16 November 2010
Garden center purchaseonce
The New York Times — Friday, 13 September 2002