Allium Caeruleum

Learn Tips on Growing Allium Caeruleum

Allium Caeruleum is also known as Blue Ornamental Onions. These perennial bulbs are often grown for the beautiful blue star shaped flowers that they produce. The flowers of the Allium Caeruleum will bloom in late spring and early summer. Each plant will produce several flower clusters.

Before the plant blooms, star shaped foliage appears, but this will die before the flowers blossom. Due to the fact that this is an onion plant, when you break or crush the leaves there will be a slight onion scent to the plant.

The Blue Ornamental Onion plant is indigenous to the mountain regions of central and northern Asia. If you plan on using the Allium Caeruleum in your flower garden or for landscaping purposes, it is a good idea to plant these among other colorful blossoms as they are best used to compliment other types of plants.

To plant the Blue Ornamental Onion you will need to dig your flowerbeds to about 4 to 6 inches deep. Keep in mind that this type of plant will need a sandy soil that is well drained, plus you will want to plant in full sunlight, unless you live in a very hot region, such as Arizona. In this case you may want to plant them in partial shade.

Before planting you will want to treat the soil with a light fertilizer or plant food; it is also important that you refrigerate the bulbs for a couple of weeks before planting. After you are done planting the bulbs you will need to cover the flowerbed with about 3 inches of mulch. This will help protect the bulbs and soil from weather or the sun drying them out before they have a chance to sprout.

Once you have your Allium Caeruleum bulbs in the ground you will have to pay careful attention to watering. It is best to water during the morning hours, as night watering may promote the growth of disease. To help the water soak the soil better you can water the plants until the soil is soaked, wait about 15 minutes and water again. This will ensure that the plants are getting enough water, even though the soil is draining quickly.

Pruning is an important part of helping your Blue Ornamental Onion plants continue growing. When you see a wilted flower head, remove it. Extra large foliage can be pinched back to help stimulate new growth as well. If the there are any flowers or foliage that appear dead or diseased, you will want to remove these from your garden. This should be done as often as needed.

To fertilize the Allium Caeruleum plants you will want to use a water-soluble plant food. Mix the plant food as directed by the manufacturer, once you have the solution mixed you can lightly spray the mixture on the flowers directly, as well as into the soil. This should not be done more than once a month. If you use too much fertilizer the plants have a tendency to produce a lot of leaves, but not very many flowers.

If you plan on replanting these flowers the following spring you will want to carefully remove the new bulbs from the soil and store then in a cool, dry place until the next planting season. Additionally, it is important that you clean up the flowerbed, removing all dead foliage and flowers. Leaving these until next spring can cause disease in your flowers when you replant.

Allium Caeruleum really make a beautiful and colorful addition to your flower garden, and compared to many types of flowers, they are relatively easy to grow and take care of.