Has Anyone Germinated Japanese White Pine Seeds?

Horticulture
1

Hi all. Today I was able to collect 10 seeds from a Japanese White pine that had cones what were open.

Has anyone ever germinated JWP seeds? What technique and timing should be used?

Thanks for any advice.

Bob

2

Soak in water for 24 hrs.
Warm stratification for 60 days.
Cold stratification for 90 days.
I mix sphagnum moss and horticultural sand 2:1. Then add sulfur powder to prevent molds.
Here in PNW, I do the warm stratification indoors on heat mats. For the JWP, I’d start it early-mid October, then either put them in the fridge or outside after 60 days of warm strat.

I have some ponderosa, shore pines, JBPs, bristlecone and chihuahuan pines using this method. Used fridge last year because animals trashed my seed bed 2 years ago.
Haven’t tried JWP though. Likely the same concept.

1 Like
3

Ok. Thanks. I’m in Southern Ontario so we get a fairly cold winter usually. I could put the seeds in my garage for the winter to cold stratify. I don’t have any heat mats, but I’ll look around and see what I can find.

Thanks very much again!
Bob

4

Room temp might be good enough if you keep it at around 70-80F. I haven’t tried just showing them outdoors in late summer and let nature take care of the seeds.
I have Doug firs growing everywhere in my yard.