No. Unfortunately, the things that a sunflower needs like water, atmosphere, and nutrients don't exist in space. So, unless you were growing it inside a spaceship with special sunlamps and other necessary things, it wouldn't work.
A sunflower typically requires about 1 to 2 square feet of space to grow effectively.
Sunflower seedlings should be planted about 12 to 18 inches apart to allow enough space for them to grow and thrive.
A sunflower can grow about 4.5 in. in two weeks.
1. is a sunflower hard to grow
it takes about 80 to 120 days (all summer) for a sunflower to grow.
they usually grow any were you want them to grow
They grow
sunflower
Yes, you can replant sunflower seeds to grow new sunflowers.
In cluster
If you put a cut stem in the soil, it is unlikely the sunflower would grow. It would need to grow from seed.
No, you cannot plant a cut sunflower and expect it to grow because it needs to be planted with its roots intact in order to survive and grow.