bighead knapweed

Bighead knapweed (Centaurea macrocephala) is a drought-tolerant species and does best in very dry conditions. The plant should receive only minimal water and should not be kept overly wet. Water this plant deeply once a month during the growing season and only when the top 2 inches of soil is dry. However, in more established plants, watering should be reduced significantly. In container-grown plants, water when the top inch of soil is dry. Allow the soil to dry completely between waterings, to avoid root rot.

Bighead Knapweed (Centaurea macrocephala) prefers full sun and will flower best when exposed to 6 to 8 hours of sunlight per day. It will tolerate partial shade, but needs at least 4 hours of direct sunlight per day for optimal growth and flowering. Depending on the season and location, the best time to get the most sun for this plant species is between 10am and 4pm.

Bighead knapweed (Centaurea macrocephala) should be pruned in the late spring or early summer, about 4 months after the plants have been planted. This species of plant responds well to regular pruning, and this can be done by removing any dead or damaged branches and buds, as well as any overgrown shoots. Pruning Bighead knapweed should be done about halfway down each stem. This will help the bush stay more compact and promote more flowers in the upcoming season. Additionally, it is important to prune the old flower heads and seed heads to prevent the plant from self-seeding and getting too large. Avoid pruning the roots of the plant, as this could disturb the balance of the root system.