of those i've only propagated loquat, and from seed. real easy, no stratification needed. a reference book i have says that since it's a broadleaf evergreen, cuttings may prefer it cooler and to try in oct/nov. it also says that well-draining medium and mist 'is essential'.
What kind of corn soldier are you? And don't say "kernel" - that's only for this tiny ad:
It's a bit like "run away to the circus" but with gardening