Do This 2-Minute Job Right Before Your Sunflowers Bloom – for Bigger, Longer-Lasting Flowers

A bright yellow sunflower is surrounded by other blooms in a sunny field.

Sunflowers always impress. But growing those tall stems, large leaves, and spectacular flower heads requires lots of energy. Fertilizing sunflowers during the season helps support this, and the plant’s needs shift in early summer.

At the start of the season, sunflowers need a balanced mix of nutrients. Once they have buds, you should fertilize sunflowers with a high-potassium feed to guarantee large, strong flowers.