During the first year the leaves gather energy through photosynthesis and use the energy to develop the bulbs underground. They don t set seed until their second year of growth.
Giant onion loves high sun exposure.
Onion plant flower. Share on facebook tweet this page. The concentric leaf bases of the developing plant swell to form the underground edible bulb. The common onion has one or more leafless flower stalks that reach a height of 75 180 cm 2 5 6 feet terminating in a spherical cluster of small greenish white flowers.
Loosen the soil around the onion with your shovel and pull the onion by the base of its green foliage to pull it out of the ground. Harvest your onion when it forms flowers. Soil must be light and drain well and poor soil is ok.
Easy to grow it is perfect in flower beds and also in pots or garden boxes to decorate either a terrace or a balcony. On average it takes onions grown from cuttings about 90 120 days to grow a new bulb. Giant onion is planted in fall more or less 4 to 5 inches 10 to 12 cm deep in light soil.
Onions are biennial plants. These plants come in a broad palette of colors shapes and sizes. Flowering may to july.
Allium is a genus of more than 800 species of bulbous perennials in the family amaryllidaceae native to the northern hemisphere but cultivated all over the world. When your onion starts to grow flowers it s ready to harvest. As autumn rolls around the leaves wither and the onions go dormant.
Most alliums have globe shaped clusters of flowers in shades of purple pink blue white and yellow.