"Going to seed" is a phrase that typically refers to plants that are past their prime, withering, or producing seeds instead of flowers or fruit. In terms of antonyms, we can think of words that signify vitality, growth, and bloom that oppose "going to seed." These words include thriving, flourishing, budding, blooming, maturing, and ripening. A garden that is flourishing is a direct contrast to one that is going to seed. Similarly, a budding relationship or maturing business is moving in a positive direction, while a relationship or business that is withering away is "going to seed." Therefore, we can use these antonyms to communicate a positive message of growth and success.