Q.How Long From Seed To Three Foot Plant?
So how long to germinate and grow from a nicked and soaked white hybiscus seed to a three foot plant?

Certified GKH Gardening Expert
For a hardy hibiscus, I would count on two to three years. Maybe a little quicker if you're growing tropical hibiscus. Also, if you saved seed from a hybrid, it won't grow true, meaning it may not look like the parent.
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/outdoor-hibiscus-care.htm
https://aggie-horticulture.tamu.edu/galveston/educ_programs/Tropical-Hibiscus.pdf
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/how-to-plant-hibiscus-seeds.htm