sources

https://www.bhg.com/gardening/flowers/sunflower-facts/

https://www.almanac.com/plant/sunflowers

https://www.britannica.com/plant/sunflower-plant

https://www.gardendesign.com/flowers/sunflowers.html#:~:text=When%20do%20sunflowers%20bloom%3F,finishing%20as%20late%20as%20October.

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