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LIFE CYCLE - is the amount of time it takes for the plant to go from a germinating seed until the resulting plant produces another seed. *Seed to seed*
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What’s Your Classification?
Horticulture Science 03B
Plant Life CyclesGrowth Forms
Size Classification
The Big Picture1. Define plant life cycle.2. Compare annual, biennial and
perennial life cycles3. Compare woody and herbaceous
plants.4. Define types of growth habit
classifications
LIFE CYCLE - is the amount of time it takes for the plant to go from a germinating seed until the resulting plant produces another seed. *Seed to seed*
ANNUAL - plant completes a life
cycle in one growing season.
Grows during vegetative stage
Produces flowers
Produces seeds
Dies
ALL IN ONE GROWING SEASON
Examples: petunias, lettuce, pansy, marigold, snap beans
Some annuals are known as summer annuals. They mature and produce seed in the warmer months of the year. Others are know as winter annuals. They thrive in cooler weather producing seeds the next spring.
BIENNIAL - plants that complete their life cycle in two years or growing seasons
1st year – seed to vegetative growth then go dormant
2nd year – continue to grow, flower and produce seed
Die
Examples: carrots, cabbage, beets, onion, hollyhock
https://upload.wikimedia.org/wikipedia/commons/3/34/Two_colors_of_onions.jpg
PERENNIAL - life cycle lasts longer than 2 years.
Herbaceous perennials have shoots that may die back to the ground in the fall. Roots survive the winter and the plant returns in the spring. It has no woody tissue.
Woody perennials don’t die back but continue growing each year. They have woody tissue.
Example: trees, shrubs and grasses
Trees and shrubs that lose all their leaves in the fall are deciduous.
Trees and shrubs that retain their leaves with some shedding periodically are evergreen.
Growth Habit Classification
Vine - a climbing or trailing herbaceous or woody plant
Trees - having a single central trunk with a mature height over 12 feet
Shrub - having several trunks with mature height of less than 12 feet