The giant pincushion flower (Cephalaria gigantea) should be watered regularly during the growing season (spring and summer). It should be given a thorough soaking with about an inch of water every 7-10 days, or as needed. Water the soil deeply until moisture is seen coming out of the drainage holes in the pot or container. In the winter months, water sparingly, or when the soil feels dry. It is important to avoid over-watering the plant, as too much water can lead to root rot.

Giant pincushion flower (Cephalaria gigantea) grows best with partial sun to full sun, or 4-6 hours per day. During the morning and late afternoon, direct sunlight is beneficial for this particular plant species. If this plant is placed in an area of direct sun, it is best to give it some morning and late afternoon shade to prevent burning.

Giant pincushion flower should be pruned in late winter or early spring. This species of plant grows best when pruned back to about 1-third its size. Pruning should be done carefully and judiciously, removing only dead or damaged wood and avoiding cutting into strong stems. If the plant is becoming too large, or if it is spreading in an undesirable location, further pruning may be necessary. Pruning tips should be followed, and a sharp, clean pruning tool should be used to reduce the risk of infection.

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