Sunflowers that are wilted

This is the sunflower that I care for withered, is it possible because of a lack of sunshine, because sunflowers usually require 5 to 6 hours of sunshine, because the sunflowers that I care for are lacking the energy of the sun, they cause wilt or can also cause death

This is what we can see
The leaves wilted and fell
When I planted it, I thought the sunflower didn't need a lot of energy from the sun
When the sunflowers are wilted
I have also tried to make fertilizer tarok
But it didn't work either.

Maybe because sunflowers really need a lot of sun because of me but he is a little less fond of the sun
That's why maybe he could wither from there
But I will come back later
So that you wear more sun
And can bloom for a while
Thank you,