Yeah EMS took over a month to get to Miami then USPS took about 2 weeks to deliver to me in NC. Even with awesome packing methods I think over one month in transit is pushing it with seeds that have to be kept damp in possibly very warm conditions. If DHL is twice the cost it would be worth it if the transit time is cut in half to have that peace of mind.
--- The question of the time that the seeds spent in transit, as I already said, is not what the post office offers in relation to the deadline, since the deadline for delivery of an EMS to the United States is 8 to 12 working days. and there was a delay in the departure of the seeds by the customs inspection here in Brazil and a delay by the customs inspection in the United States. So the delay, because the paid service was the Express / EMS.
But I made some shipments today through DHL, and I hope everything goes well, if the delivery takes place within the informed period of 5 to 8 business days, I will migrate the shipments to DHL, and really the cost of the freight being higher is definitely worth it.