Wheatgrass seeds are available in numerous places online that will ship them directly to you. You can also consider purchasing wheatgrass seeds locally in your city or town from a health food store. One benefit of the seeds is that they are able to last a long time, if they are stored in a cool, dry place. Any seeds you purchase should say certified USDA organic, so you will receive the maximum nutrients from the wheatgrass when it grows.
Remember that buying wheatgrass seeds in quantities like 25 lbs. or more tends to save you money in the long run. If you know that you will need to consume a large quantity of wheatgrass over a period of time, it is definitely more economical to purchase seeds in bulk.
Consider a company like Wheatgrasskits.com that obtains seeds from Washington state. The company retails wheatgrass seeds in various quantities ranging from 8 oz. to 50 lbs. The website states that its organic hard red wheatgrass seed has a wonderful germination rate. If you want to purchase a full growing kit with trays, seed and other supplies, this company retails those as well.
The Wheatgrass Man sells bags of "Genesis" wheatgrass seed ranging in weight from 7 to 50 lbs. The product this company sells is organic. The website includes instructions on how to grow your own wheatgrass; other supplies that you may need are available as well.
Go to a local health food store like Earth Fare if you want to buy your seeds locally. If you are on a budget, however, you will find better savings online, in terms of purchasing your wheatgrass seeds.