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Perennial plants live for more than two years. They return year after year and continue growing until they reach maturity, which varies by plant but averages three to five years. The term "perennial" refers to herbaceous (“green") plants since woody plants, such as trees, are perennial by definition.
Subsequently, one may also ask, what type of plants come back every year?
Unlike annuals, perennials tend to bloom for just a short time — one to three weeks — each year. Examples of popular perennial flowers include tulips, asters, black-eyed susans, and lilies. Perennials generally do not have to be replanted each year.
Secondly, what is the difference between annuals and perennials?
Annual plants live for one growing season and then die, while perennials regrow every spring. The difference is genetic, and yet, a clever "plant gene therapy" technique can be used to change an annual into a perennial.
The Hardiest of Hardy Perennials
- Alpine Rock Cress (Arabis alpina)
- Tiarella.
- Blue Dogbane (Amsonia tabernaemontana)
- Liatris (Liatris spicata)
- Dwarf Goldenrod (Solidago sphacelata)
- Yarrow (Achillea)
- Creeping Phlox (Phlox subulata)
- Obedient Plant (Physostegia virginiana)