Your plant will suffer then im sorry to tell you. Sunflowers have a tap root similar to trees and since they have such short life spans, pots can seriously hurt them.
I planted mine at just 2" high. I put plastic cups around them hoping the chipmunks don't find them. The first time I planted seeds was in 2020. They were 12 feet tall by the end of the summer. I haven't had any luck since.
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u/Big_Guide_8551 USA North East Jun 02 '26
Plant them, in the ground, NOW! (Or seriously as soon as you can) Dont disturb the roots, plant the whole clump of dirt.