How to Grow Allium giganteum? Cultivation Methods and Precautions

Many people are probably unfamiliar with Allium giganteum. It is a relatively uncommon flower variety in daily life. When it blooms, it is very beautiful, with spherical flowers, commonly seen in purple, and its ornamental value is very high, which is why it attracts many people to grow it. However, before growing it, you should not do so blindly; you still need to master some techniques.

How to Grow Allium giganteum

1. Allium giganteum is planted after autumn. Bulbs reaching 3 cm or more can bloom after planting, while those smaller than 3 cm need to be grown for one year before they can bloom. Bulb multiplication rate: Allium giganteum likes a cool, sunny environment, requires loose and fertile sandy loam, and dislikes waterlogging. It is suitable for cultivation in northern China.

2. For open-field cultivation of Allium giganteum, choose cultivation land with a low groundwater level, good drainage, and loose, fertile sandy loam. The best time to plant the bulbs is from mid-to-late September to early October, with a plant spacing of 20×30 cm. The planting depth is such that the soil covering the bulb is 2 to 3 times the height of the fresh bulb.

3. After planting Allium giganteum, slightly press the hole surface flat, then water. In winter, there is no need to cover it for cold protection. In March of the following spring, when the leaves emerge from the soil, loosen the soil and water in time. Along with liquid topdressing, water once every 10 to 15 days. Pay attention to intertillage, soil loosening, and weeding. In places with dry air, appropriately increase a small amount of artificial misting or shading, which can ease the change of leaves turning yellow in early summer.

Cultivation Methods and Precautions for Allium giganteum

I. Cultivation methods:

1. Light and temperature. Allium giganteum likes a sunny growing environment and does not like semi-shade. The suitable growing temperature is between 15°C and 25°C, and it prefers coolness. In winter, generally no extensive cold protection measures are needed. In summer, the aboveground part of Allium giganteum will die back, and the underground bulbs can be dug out and stored in a ventilated place.

2. Watering and fertilizing. Allium giganteum requires good water and fertilizer management, and watering should be combined with fertilizing. During the growing period of Allium giganteum, it is necessary to loosen the soil and water in time. Generally, fertilize once every 2 to 3 weeks, applying some thin liquid fertilizer, and water along with fertilizing. In summer, when temperatures are high and the air is dry, air humidity can be increased through shading or misting. During rainy periods, drainage should be timely to avoid waterlogging, which can cause bulb rot.

II. Precautions:

The growth of Allium giganteum requires loose, fertile sandy soil with good drainage.

What to Do If Allium giganteum Does Not Bloom

1. Watering: If you want it to bloom, do not water too much. Excessive water can also cause the plant's roots to rot. The soil is best kept at 50% moist and 50% dry. Moreover, it is best to water in a fixed amount, and avoid the phenomenon of watering too much this time and too little next time. This is unfavorable for any plant.

2. Soil: Soil is the foundation of planting. If you want this plant to bloom, soil is also very critical. When choosing soil, be sure to select sandy loam with good drainage and a certain amount of humus. Many friends think that blooming has little to do with soil, but this is a mistaken idea.

3. Ventilation: Ventilation is a problem that many beginners overlook when growing flowers. This plant needs a smooth, ventilated environment. In addition to being beneficial for blooming, it can also effectively reduce the invasion of pests and diseases.

Diseases of Allium giganteum and Their Control

The common disease of Allium giganteum is rot. After the disease occurs, promptly remove diseased remnants, gather them and bury them deeply or burn them. In addition, 1 part 75% Daconil wettable powder can be mixed with 50-100 parts fine dry soil and scattered on the soil surface as a treatment. Of course, if necessary, the potting soil can be directly replaced. In the early stage of the disease, some liquids can be sprayed, such as 40% chlorothalonil suspension concentrate at 500 times dilution, 50% thiophanate-methyl wettable powder at 800 times dilution, or 50% benomyl wettable powder at 1000 times dilution. The affected areas can be smeared with medical miconazole nitrate ointment, which can effectively treat the condition.

When growing Allium giganteum, be sure to pay attention to the soil ratio, then do a good job controlling temperature and light, and also apply fertilizer and water or prevent and control diseases at the right time. Only by doing all this work well can the growth of Allium giganteum be better ensured.