Planting allium, commonly known as ornamental onions, is a delightful way to add unique and striking blooms to your garden. Here's how to do it:
Choose a sunny spot in your garden with well-draining soil. Alliums prefer full sun and thrive in soil that doesn’t stay waterlogged. To improve drainage, consider adding some sand or gravel to the planting area if your soil is heavy or clay-based.
Plant allium bulbs in the fall, before the ground freezes. The exact timing depends on your climate, but aim for about 4-6 weeks before the first hard frost. Dig holes that are about three times the height of the bulbs. For most alliums, this means planting them about 4-6 inches deep. Space the bulbs about 6-8 inches apart, depending on the variety.
Place the bulbs in the holes with the pointed end facing up. Cover them with soil and gently firm it down. Water the planting area thoroughly after planting to help settle the soil and initiate root growth. Once planted, alliums require minimal care. Water them during dry periods in the spring and early summer, but avoid overwatering as this can lead to rot.
After blooming, allow the foliage to die back naturally. The leaves provide energy to the bulb for next year's growth. Once the foliage has yellowed and withered, you can cut it back. Alliums are generally hardy and don’t need to be dug up and stored over winter in most climates.
Consider leaving the dried flower heads on the plants for winter interest and to provide seeds for wildlife. Alternatively, you can cut and dry the flower heads for indoor arrangements.
By following these steps, you can enjoy the stunning spherical blooms of alliums in your garden with minimal effort.