I got a pm asking what I did to get the samples so I will post a generic email that I sent to numerous companies. It would probably be best to change it up quite a bit because if they suddenly get numerous identical emails then they probably wont send anything. Include what type of garden you have, soil/hydro etc...
Don't forget to give your address and do not mention what you are growing.
I was recommended to you through a friend who depends on your products.
I am currently using (insert competitors name) line of nutrients and additives on my (type of garden), and I am happy with them, but, I have been told that since switching to your products my friend has increased his yields and overall plant health significantly. Before I make a switch I would like an opportunity to try some of your products and was hoping that you may have some samples that I could try on my next grow along side (insert competitors name) nutrient line up so that I may decide what will work best for my needs in the future. Any assistance you could provide would be greatly appreciated.
Insert name and address
I hope this helps and remember to change it up some because I ton of identical emails will likely be ignored!