July 10th the soonest to stake, 30 days Is the minimum staking period.
Something that will be changed, consensus is 5 day staking maturity is a good target and fits within FLT's purpose as a currency to be used in regards to PoT. I have to say, looking at explorer, diff is at .35 now, and a good bit of PoS going on too, which is nice to see.