Applying KNF to large mature trees?
Top answer
From the KNF library
The library has no recipe for shade trees like maple or elm. It has a few pieces that touch trees.
Drake's library says trees do well with wood chip mulch spread out past the drip line. (KNF Demystified, p. 16) It also says to add microorganisms when you mulch, to avoid carbon and nitrogen depletion. (KNF Demystified, p. 16)
For a transplanted blueberry bush, the library rings the drip line with IMO after planting. (Office Hours Ep. 50, 45:52)
Cho's recipe book covers fruit trees, not shade trees. It dilutes Mineral B or C at 1/1,000 for soil irrigation. (Cho, Recipe, p. 88) For fruit trees it adds deep-soil injection alongside leaf spraying. (Cho, Recipe, p. 88)
The library does not say whether any of this carries over to maple or elm. It says nothing about spraying bark, foliar rates for a large canopy, or timing. The maintenance ratios in the existing answer are not repeated here.
Sources
- 45:52 Office Hours Ep. 50 (Oct 2022) — IMO Bath, Hemp Hurd for IMO3, Transplanting with WCA · “then ring the drip line with IMO after planting”
- p. 16 KNF Demystified · “trees love being mulched with chips out past the drip line”
- p. 88 Cho, Recipe · “Soil irrigation: Dilute M-B or MC in the ratio of 1/ 1,000.”
