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Manure an mushroom compost is bad for trees on PT

poncirusguy6b452xx

10 years ago

From the catalog of "just fruits and exotics"

" Do NOT add mushroom
compost or manure to the planting hole OR use it as mulch. Manure can make
citrus on trifoliate rootstock very sick and could even kill the tree."

http://justfruitsandexotics.com/JF%20Citrus.pdf

page 2 in box under grafted trees. It appears that they graft kumquats to PT

I am still looking for the information stating that PT and Meyer lemons poison the graft junction after some years. When I find it I will post it and its source as I posted this.

Steve

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Comment (1)

hoosierquilt USDA 10A Sunset 23 Vista CA
10 years ago
last modified: 10 years ago
Steve, not sure "poison" is the correct adjective, but more a graft incompatibility between the rootstock cambium and the cultivar cambium. I believe kumquats are usually grafted to a Pt rootstock, and frequently to 'Flying Dragon'. Kumquats are incompatible with sour orange rootstock. Meyer lemons are not grafted to a trifoliate rootstock due to incompatibility, but to other lemon/lemon-like rootstocks, such as Rough Lemon, Yuma Ponderosa, and Macrophylla.

Patty S.
0
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