Yes they are endangered
You need to be growing the proper species. Not all of them will grow that tall. Look for "Giant" sunflower seeds.
With the exception of Jerusalem artichokes, all domesticated sunflower varieties are annuals. There are a few wild species that are perennial.
There are about 70 species of sunflower, the more common domestic varieties flower in late spring, summer and into early autumn
It cannot live on Mercury because the atmosphere is too tenuous.
Sunflower seeds. Sunflower seeds. Sunflower seeds. Sunflower seeds. Sunflower seeds. Sunflower seeds. Sunflower seeds. Sunflower seeds. Sunflower seeds.
The largest plant families are: Asteraceae (Sunflower family) ~24,000 species Orchidaceae (orchid family) ~20,000 species Fabaceae (Legume family) ~18,000 species Poaceae (grass family) ~10,000 species Rubiaceae (coffee family) ~10,000 species
Bidens torta, the corkscrew beggarticks, is a flowering plant species in the sunflower family with five petals.
Bidens torta, the corkscrew beggarticks, is a flowering plant species in the sunflower family with five petals.
Bidens torta, the corkscrew beggarticks, is a flowering plant species in the sunflower family with five petals.
The sunflower sea star (Pycnopodia helianthoides) is a large predatory starfish with 15-26 limbs called rays. They can grow up to an arm span of 1 m (3 ft.) in diameter. The colour of the sunflower starfish ranges from bright orange, yellow and red to brown and sometimes to purple, with soft, velvet-textured bodies and 16-24 arms with powerful suckers
an overlap in their niches