Typical sunflowers that are planted are annuals; however, there is a newer crop being developed called "perennial sunflowers."
biennials annuals
If you put a cut stem in the soil, it is unlikely the sunflower would grow. It would need to grow from seed.
I'm guessing regular water, considering it is a sunflower. But don't judge on what I say, look it up on different gardening websites and books - You'll find the answer somewhere!
Any plant... Gum tree, sunflower, grass, roses, palms etc.
Generally fats present in plants are in the form of oils; canola, sunflower seed, etc.
biennials
bulps Annuals, Biennials, Perennials
Onions are biennials, meaning they typically complete their life cycle in two years.
biennials
perennials
Angiosperms are classified as annuals, biennials, or perennials based on the length of their life cycles. Flowering plants that complete a life cycle within one growing season are called annuals. Angiosperms that complete their life cycle in two years are called biennials. Flowering plants that live for more than two years are called perennials.
Annuals are plants that complete their life cycle in one year, biennials take two years to complete their life cycle, and perennials live for multiple years. When selecting plants for a garden, one can distinguish between them by considering how long they will live and how often they will bloom or produce fruit.
The flower that people recognize as a "carnation" (Dianthus caryophyllus or clove pink) is a herbaceous perennial plant. Within the carnation or dianthus group of flowers there are also annuals, biennials and even low subshrubs with woody basal stems.
Sunflower plants are annuals, meaning they need to be replanted each year as they do not come back on their own.
There are dozens of marigolds, and some are annuals while some are perennials.
There are many varieties of daisies. Some are annuals and others are perennials.
They are perennials. They are very hardy plants!