Re: Cutting
I think it depends on the species. I think with some species it can be helpful but with others it can cause the seeds to rot before the conditions are ideal. I'd suggest saving it for a last ditch effort or if you have quite a few seeds of a species you can maybe scarify half. Ideally check with others who have germinated the species you are trying. Try a method that works and if that fails then try scarification. You might also try sanding lightly and then if that fails you can scarify further. In sterile conditions removing the seed coat allows for almost 100% germination but if you can provide that then you can just buy a plant and do tissue culture about as easily.
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