'Autumn Joy' is a perennial flower that blooms all year and that can be grown in zones 3-9 across the variety of climates that can be found in these zones. This sturdy sedum provides the landscape with reddish-pink flowers in late summer.
The short answer is that annuals don't come back. Plants that flower and die in one season are annuals—although many will drop seeds that you can collect (or leave) to grow new plants in the spring.
Ornamental kale and cabbage are some of the most popular winter annual plants. They lend a completely different texture to a winter landscape bed. Once the plants are hardened by cooler night temperatures they can survive most cold winters.
Fall and Winter LEAFY GREENS
A beautiful sampling of some of the leafy greens you can grow in your fall and winter garden, including different varieties of kale, spinach, lettuce, chicory, and even wild chickweed! Spinach is a very fast-growing, cool weather vegetable.
Crabgrass, petunias, and snapdragons are types of annual that will not survive cold temperatures and will need to be cared for to survive winter.
The snowdrop flower. As a plant that actually despises warm winters, the snowdrop flower performs its best in frigid temperatures. This flower can withstand temperatures down to -30 F. while still displaying its bright green stems and delicate, white flowers.
Choose The Right Containers
Terra-cotta and ceramic pots absorb moisture, which expands as it freezes and cracks the container. Metal, concrete and wood containers typically handle freezes well, as do fiberglass and resin pots. Some plastic pots also survive winter fine, but may become brittle over time.
Japanese yew (Taxus cuspidata) is a good choice for an outdoor winter plant because it's an evergreen that keeps its leaves on its branches all winter long. It's drought-tolerant and thrives in both full and partial sun. Hardy to Zone 4, Japanese yews can survive harsh winters.
The only plants that don't go dormant during the winter are annuals, which are only capable of surviving for a single growing season, and must be replanted each year for continual enjoyment.
There are a few bulbs that are winter blooming flowers. Dainty and delicate, snowdrops (Galanthus) are true spring harbingers. No bigger than a dandelion, they bravely push through snow and even ice to grace the garden with their dangling white bell blooms.
Hardy winter annuals include snapdragon (Antirrhinum majus), pansy (Viola x wittrockiana), viola (Viola cornuta), sweet alyssum (Lobularia maritima), painted tongue (Salpiglossis sinuata), pinks (Dianthus chinensis) and nemesia.
Perennials are a flower garden's backbone, providing beautiful color, texture and form. They are easy-care, dependable performers that come back every year. They also are: Uncommonly colorful thanks to foliage and/or flowers.
Leafy vegetables like cabbage, lettuce, kale, collards, and chard can tolerate some frost. Early spring blooming flowers like crocus, snowdrop, and primrose can all survive the winter, and pansies are especially resilient.
Most evergreen conifers, however, that have a strong central leader, such as: Japanese red-cedar (Cryptomeria); fir (Abies); spruce (Picea); and cedar (Cedrus) can be covered in snow without it causing a serious effect.
But no, the agave americana is definitely from Earth. It's also known as a century plant because it only blooms once every 100 years (roughly) and then dies.
The corpse flower (Amorphophallus titanum) is the largest unbranched inflorescence in the plant kingdom, boasts a powerful stink, and blooms for just 2-3 days once every year or two. The bloom can grow up to 8 feet tall! This plant fascinates visitors of all ages.
Giant Himalayan Lily. (Phys.org) —A relatively rare plant that flowers only once in seven years and then dies has blossomed - delighting horticulturalists at the University of Aberdeen. The Giant Himalayan lily - or Cardiocrinum giganteum var.