Cornflower

Overview. Cornflower is an annual that is often seen growing wild in fields and along roads. Its flowers come in blue, pink, red, lavender, and white. Each flower head is about 1½ inches (4 cm) across. The plant comes from western Asia and Europe. Birds and butterflies use its flowers and fruit for food.

Reseeding. The plant reseeds easily and can spread on its own.

Sowing. Start seeds indoors about 6 to 8 weeks before the last spring frost. In mild winter climates, seeds can be sown directly outdoors in the fall instead.

Light and soil. Cornflower grows in full sun or light shade. Without enough shade, stems tend to flop. It tolerates poor soil and needs no fertilizer. It prefers soil that is well drained and moist.

Support. Taller plants may need staking. Planting them with other plants that hold them up also helps.

Deadheading. Deadhead the flowers for more continuous bloom. If you want to limit reseeding, remove spent flowers. If you want to attract birds and butterflies, limit deadheading.

Growing in pots. The plant can be grown in a container to better control its seeds.

Pests and diseases. The plant has no serious insect or disease problems to note. Wilt, rots, and rusts are possible, and aphids and mealybugs are worth watching for. It is noted as resistant to deer.

Late season. The plant can lose its looks late in the season, so it works well in a cutting garden.

Cut flowers. The flowers are attractive and long-lasting when cut. The flowers are also edible.

Pets. Cornflower is listed as non-toxic to cats and dogs.

People. The flowers are edible.