Perennial plant


November 28, 2021

A perennial plant is a plant that survives for multiple years as an individual. Perennial inn root grass and woody plants correspond to it. It is a term often used for herbs (so-called grasses) and is sometimes called "perennial".


In contrast to perennials, plants that finish their generation in one year are called "annual plants." In addition, plants that germinate before winter and bloom and die from spring to summer beyond winter are sometimes called "biennial plants", but they are called "perennial plants" and are practically annual plants. On the other hand, plants that end their generation within two years over one year (such as Hatazao and Tsukimisou) may be defined as "biennial plants". Plants are generally perennials in environments where plant growth can be sustained throughout the year, such as in tropical rainy areas. If there is a season that is disadvantageous to the growth of the plant, such as the severe dry season or winter, it will become a perennial plant if it can be overcome. Therefore, some plants are perennials in the tropics, but are annuals in the temperate zone. Some of them appear on the ground all year round, but the stems and leaves above the ground die during wintering, while the rhizomes and roots remain dormant, and the stems and leaves grow again the following year. There is also. Such a thing that only the above-ground part withers is called "Yukune-kusa". In the field of horticulture, it is called "evergreen grass" including "evergreen grass" as described later.

One fertility (one-time fruiting)

Although it belongs to a rare category, there are some that germinate in the first year, grow in the second year, and bloom and die in the third year (such as Corydalis incisus). However, there are not many agave plants in particular, but rather there are many plants that grow without flowers for a longer period of time, and finally bloom and die. And agave. Plants with such a life history are sometimes called "monocarpic" (single fruiting, English: monocarpic).

Evergreen perennials, perennials, bulbous plants

"Evergreen perennials" that have green leaves all year round, such as mint and trailing ice plant, and "Yukkonso" that die above the ground during periods when they are not suitable for growth (mostly in winter but sometimes in summer). ). In addition, plants that form bulbs such as bulbs, tubers, and corms are called "bulb plants". In horticulture, evergreen grass and indigo grass are collectively called indigo grass. If you dare to call it "perennial" in the horticultural area, insert evergreen grass.

Propagation of perennials

As a general rule, bulbous plants are increased by shunting, but if you want to increase a large number of seedlings that bloom in one year at a time (lilies, anemones, ranunculus, part of dahlia, etc.), increase them by seedlings. In addition to seedlings, cuttings and stock splitting are performed at Yado Negusa.


The terms "perennial" and "first grade" are expressions that can be used not only for plants but also for all living things.

Related items

Annual plants Biennial plant

External link

"Perennial plants" --Kotobank

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