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What Are Plant Bulbs?
Bulbs are the parts of the plants that are planted underground. The bulbs grow to become plant seedlings and eventually become mature plants to bloom flowers. They are so called bulbs because of their shape and because the bulbs are fleshy. Most bulb plants gather nutrients from their leaves and the nutrients are stored in the bulbs therefore preserved to provide food for future plants. This is the reason why these varieties of plants grow and bloom in almost every climate around the world.
The different kinds of bulbs are true bulbs, corms, tubers, tuberous roots and rhizomes. True bulbs are the bulbs which have scales on them. These scales are thin, dry and papery that wrapped around the bulbs. These scale coverings are called tunic. Corm bulbs are the only one among the bulbs with the basal plate which is where the roots grow. The basal plate is a hard tissue and its function is to support the bulb. Rhizomes are also called rootstock. They are the bulbs that has thick stem and they grow horizontally and this way they sometimes bring out some roots above the ground. Tuberous roots are the only bulbs that store nutrients in the roots. These are the bulbs that do not gather foods from their leaves. They rely on their fibrous roots to take water and nutrients from the underground. The buds start to grow from the base of an old stem. Tubers are bulbs that have no covering nor basal plate. Tuber bulbs have tough skin where roots originate to grow. These type of bulbs are fat, short and round. The exterior part of these rounded bulbs is where the new buds emerge and become mature plants.
So how's the bulbs life cycle? Spring bulbs should be planted during the fall season. The bulbs then quickly develop their embryos and produce leaves and flowers as soon as they are established in the ground. When winter comes and temperature drops, the growing stage of the bulbs' leaves and flowers stops although the bulbs under the ground do not die because they are continuosly supplied with nutrients that are stored in them. Winter temperatures do not cause the fleshy bulbs to wither and be thawed. When winter temperature falls to thaw, the bulbs start to pop their buds and tips of their stems to the surface of the soil and when freezing temperature returns, the bulbs quickly stop it's growing stage. If weather temperature gets increasingly getting warm, the bulbs start growing again and produce beautiful plants and flowers. During this time then, the bulbs replenish their nutrients. Bulbs have become fleshy and fattened. By the time the leaves turn withered, the bulbs have replaced their old bulbs with new ones and created their new embryos for next year's spring flowers.
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