Bigcone Spruce/Douglas-fir (Pseudotsuga macrocarpa) seed collecting

Cruiser

Chumono
Messages
847
Reaction score
2,095
Location
Western Washington
USDA Zone
8a
A cousin to that other pseudotsuga we know and love (menziesii). Macrocarpa is better adapted to arid conditions and wildfire.
It has a small range in Southern California, where it frequents chaparral and dry woodlands.

Macrocarpa grows in scattered patches or as lone individuals. It does not form a ubiquitous overstory, like menziesii.
1727218777583.jpeg

Long straight branches coated with foliage set its silhouette apart from associates.
1727221081113.jpeg

Needles, bark, and buds are similar to menziesii.
1727221214526.jpeg
1727221501562.jpeg

Cones are bigger and woodier than menziesii. Seeds are larger with shorter wings.
1727222924581.jpeg
1727222964381.jpeg

Macrocarpa is thought to have a close relationship with oaks and may be reliant on them early in life. An oak over-story helps shelter establishing trees from excessive heat and drought; and relative to other chaparral species, provides a less-combustible buffer to fire.IMG_0678.jpeg

An interesting feature of bigcone Douglas-fir is the ability for it to vigorously re-sprout from trunk and branches following complete needle loss. (eg after a wildfire) This seems like a useful ability one could manipulate for bonsai purposes..

Of 14 collected cones: 4 came fresh from branches. The rest were found on the ground, partially ripped open by birds and squirrels looking for a meal.
228 viable-looking seeds were obtained. Many more disfigured or damaged seeds were tossed. The best cone contained around 50 keepers.

1727227511814.jpeg
IMG_0717.jpeg
IMG_0720.jpeg

The plan is to divide the seeds and try different strategies for germination. Some will get planted now to over winter outside, others will be stored in a freezer, fridge, or at room temp, then planted in spring.
 

Attachments

  • 1727227662202.jpeg
    1727227662202.jpeg
    196.2 KB · Views: 2
Last edited:
Cool post, I was not aware of this species! Looks like the needles are much longer than the Doug fir we have out here.
 
Cool post, I was not aware of this species! Looks like the needles are much longer than the Doug fir we have out here.
Needles are around an inch or so.
I’m surprised that more people in SoCal have not tried this species. It does not require as long or as cold winter dormancy as other montane conifers.
Lots of potential here I think.
 
Last edited:
Back
Top Bottom