This may seem really silly, but...

[Raene]

can you grow wheatgrass OUTdoors? Just in the dirt in the veggie garden with everything else? Thanks :)

[Veganforlife]

Yes! And it would probably thrive! That's actually THE best way to grow it! (In my opinion)...
check this out:

http://www.wheatgrassman.com/site/1538595/page/631111

here's another site:

http://www.wheatgrasskits.com/faq.htm

This is an answer I found:

Should I grow the wheatgrass outside or inside?

It is optional. Your wheatgrass will do better if it is in indirect sun and a fairly cool place. The hot sun of the summer will wilt your grass. 70-80 Degrees is the optimal temperature