Sunflower 'Lemon Queen', Perennial Sunflower 'Lemon Queen'. Free-flowering, Helianthus 'Lemon Queen' (Sunflower) is ideal to brighten up the late season garden. This tall and upright perennial features luminous sprays of pale yellow flowers, 2 in. across (5 cm), with light yellow ray florets surrounding a dark yellow central disk.
When it comes to the fertilization of sunflowers, nitrogen is extremely important. Fertilization of sunflowers with added nitrogen will contribute to the overall green growth of the plant. Fertilizing a sunflower with nitrogen will increase the height of the plant too.
Prefers full sun and enjoys moderately fertile, humus-rich, moist, neutral to alkaline, well-drained soils.