I don't recall that I've seen a thread about Fremontodendron propagation or rooting cuttings from a Fremontodendron.
Has anyone had luck taking cuttings and get them started to root.
Ferenc

Ok. I found this tiny quote referring to two publications:

Methods of propagation are discussed in detail in the literature [20,22].
20. Horton, Jerome S. 1949. Trees and shrubs for erosion control of southern
California mountains. Berkeley, CA: U.S. Department of Agriculture,
Forest Service, California [Pacific Southwest] Forest and Range
Experiment Station; California Department of Natural Resources, Division
of Forestry. 72 p. [10689]

22. Hyland, Bob. 1990. Fremontodendron `California glory'. Public Garden.
Wayne, PA: Journal of the American Association of Botanical Gardens and
Arbors; 6(2): 41-42. [21985]

the second one is a journal and may be found perhaps at the library at your university.

There's a little bit of information here:
http://www.wildflower.org/plan...

Thanks Mary and Woofie for the info ,already tried the soft wood cuttings but no succes, i will have it a go with the seeds propagation

Have you tried doing the softwood cuttings using bottom heat? That can make a big difference in rooting cuttings.

I have a fremontodendron that is dying. It appears to have sent up 8 root shoots up hill, where the main root was nicked during an invasive bamboo removal nearby. I found your post, and then found some information on summer hard-wood cuttings on the Royal Horticulture Society website. Here is the link, if anyone is still interested in vegetative propagation by mallet cuts best taken in summer season (after bloom period) - while this plant is in its summer dormant state.

https://www.rhs.org.uk/Plants/...

If I have any success, I will post photos of my experiments.

I've never heard of this plant, but for any plant that can theoretically be propagated by cuttings, layering is always the method I choose if at all possible. Bend a branch to the ground or a pot so it is in contact with the soil. Lay a rock or brick over it to keep it in place. Forget about it for a while. When it's taken root, and you're ready to move it, sever the branch from the mama, dig up its' new rootball and place in new home. Anyone can do it (as long as the plant material is amenable to being vegetatively propagated!)