fructifier
/frʌkˈtɪfaɪər/Definitions
1. noun
one that fructifies or causes to fructify, especially a substance or agent that promotes the ripening of fruit or flowers
“The gardener applied a fructifier to accelerate the ripening of the tomatoes.”
2. verb
to cause to ripen or produce fruit or flowers
“The warm weather fructified the flowers, making them bloom early.”