I’ve used 3RiversBiotech for my testing and they’re pretty great IMO. Quick turn-around time! Usually within 24hrs of arrival in my experience. And I think @potpotpot got his results back on a Sunday! So they apparently work weekends too ^^
Just to be sure I would have the results by week end I opted to send the samples in FedEx 2 day and even going across country was less than $10.
The samples are stable in the sampling kits for up to two weeks but the quicker the better obviously.
Well the samples were delivered yesterday and when I got up this morning I had my results via email.
Easy Peasy!
So for less than $100 I know my little garden is ok for now