Hi,
It is possible to boil Neem fruits to make Neem JHS. But Ginkgo fruits, Oleander leaves and Bracken fern leaves are recommended instead because they are much more effective than Neem.
Try to obtain Oleander or Bracken fern if Ginkgo is not available in your region.
Combining Neem oil with JHS made of Ginkgo fruits, Oleander or Bracken when making JNP pesticide will not increase its pesticidal effects.
Combining Neem fruit JHS with Ginkgo berry JHS, Oleander JHS or Bracken JHS when making JNP pesticide will actually decrease its pesticidal effects. It is best not to mix different kinds of JHS together.
Combining Neem fruits with Ginkgo fruits, Oleander or Bracken when making JHS will not increase pesticidal effects of JHS either. It is best not to mix herbs when making JHS.
Also, JHS and FPJ are very different agricultural inputs.
FPJ is an older recipe invented by the father of Mr. Cho. It is not used in JADAM because it contains sugar.
FPJ does not have pesticidal effects.