Bill Barger, an American, grafts all pines to Pinus strobus. I've never heard of the other way around where 5-needled are put onto 2-needled.

The first time I read here from Resin that Pseudotsuga is relatively a close match to Larix was many years ago. I do not recall specifically P. japonicum (as problematic.) Only that Larix and Pseudotsuga are close enough a match to be interchangeable when rootstocks of the the same Genus are not available. The question of long-term was never addressed.

Dax

salicaceae(z8b FL)

I've heard that this has been tried, but rarely works. A friend of mine said he tried to use P. menziesii as rootstock for P. japonica many times, but the grafts always fail. Graft incompatibility has long been an issue for P. menziesii on itself too. Not sure why.

Like Bookmark January 3, 2014 at 9:27PM

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hairmetal4ever(Z7 MD)

Do you think they can hybridize, salicaceae?

The offspring might have to be cutting or tissue-cultured if there were a good one, but if such a cross would "take" it might be worthwhile.

Like Bookmark January 3, 2014 at 10:47PM

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pineresin

"Do you think they can hybridize, salicaceae?"

No; P. menziesii has a different chromosome number (2n = 26; c.f. 2n = 24 for P. japonica and almost all other Pinaceae). That prevents hybridisation, though it won't be the cause of graft incompatibility. I've seen P. menziesii grafted successfully on Larix kaempferi, so it can be done.

Resin

Here in " Europe" , we have many problem with the 5 needles pine rootstock, due to the roots system in pot and container, but also with fungi on Pinus strobus.

Maybe the grafting on 2 needles pine are a (part) solution ?

It seems ok since your Pinus cembra is doing fine after many years. For faster growing trees of 5-needles then you put those on sylvestris? Pinus peuce 'Aureovariegata' seems too fast for uncinata or maybe Aureovariegata is less than 6"/15cm annual growth during it's fastest years? I do not know but regarded it as a tree and not an intermediate or dwarf.

P.armandii ? Why not it for 5-needled grafts? I have heard it's very good for greenhouse conditions and not the concerns of P. strobus.

Dax

Very interesting.

Why not 5-needle on to Parviflora?

I ask because I may want to graft a Longaeva and am thinking of rootstocks.

Since you live in the UK, I would think armandii since rootstocks are commonly available, severn.

Dax

I've been told by very reputable grafters that longaeva can be grafted onto sylvestris with good results. I geuss this is in line with Clement's results with uncinate pine. Have also heard in the past that thunbergii is an understock of choice for parviflora in the context of bonsai, since it can tolerate a good deal of abuse.

severnside, you may want to try a few different species of understock to see which work the best for you.

That cembra cultivar is beautiful. Clement, do you know the cultivar name?

Pinus sylvestris an nigra are also possible I think.

About pinus armandii used in quantities now, It's always questionable if it's so good ?

Know you many trees ? Used from +/-10 years it's to short time for a good evaluation.

Pinus parviflora ... why not, but surely not better.

For Pinus peuce 'Aureovariegata', don't forget Pinus uncinata are also a tree, medium but not dwarf like Pinus mugo so used in the past.

Thanks Maple I will look into that.

I also might want to salvage a Flexilis by grafting that isn't thriving and I guess the same as Longaeva applies.

It's Pinus cembra 'Pygmy'