Towards the end of the season, fertilizing your flowers with a high-potassium feed can reward you with a late burst of blooms. Flower beds, borders, and containers can enjoy a last hurrah as your late summer gardens fill up with color.
Gardeners can use fast-acting liquid fertilizers until the plant stops producing new flowers, which can be mid-September in colder climates and later in warmer zones. For many gardeners, this means a few more weeks of using a high-potassium feed every 1-2 weeks to encourage more blooms. But remember to stop feeding a month before your first predicted frost.
