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Some lilies, such as the tiger lily Lilium lancifolium, form small bulbs, called bulbils, in their leaf axils. Several members of the onion family, Alliaceae, including Allium sativum , form bulbils in their flower heads, sometimes as the flowers fade, or even instead of the flowers (which is a form of apomixis).
The bulbs are produced to satisfy the demand for bulbs for parks, gardens and as house plants, in addition to providing the bulbs necessary for the production of cut flowers. The international trade in cut flowers has a worldwide value of approximately 11,000 million Euros, which gives an idea of the economic importance of this activity.
The bulbs need some exposure to cold temperatures for 12 to 14 weeks in order to bloom. [1] Flower bulbs are generally planted in the fall in colder climates. The bulbs go dormant in the winter but they continue to absorb water and nutrients from the soil and they develop roots. [2] Most bulbs produce perennial flowers.
Place the bulbs in the soil with the pointed sides up, making sure to plant each bulb close together. Cover small bulbs with a 1/2-inch of soil and larger bulbs up to their tips. Water the bulbs well.
The orientation of the bulb is essential for daffodils to flower. Bulbs need to be planted with the pointed end up. Bulbs too small. The smaller the bulb, the longer it takes to bloom. If the ...
Bulb: A short vertical underground stem with fleshy storage leaves attached, e.g. onion, daffodil, and tulip. Bulbs often function in reproduction by splitting to form new bulbs or producing small new bulbs termed bulblets. Bulbs are a combination of stem and leaves so may better be considered as leaves because the leaves make up the greater part.