You can usually find Alfalfa in 50# bales for pretty cheap. ~$6, if you are willing to drive a little or catch a farmer on a commute.
Just gotta do a little Internet searching.
Out in Cali it may be more.
man that raspberry cough really is blowin up ive always been told thats a hard one to grow outdoors, but your proving them all wrong, ive got a few beans of the blackberry from the same seed bank and cant wait to see what they do one day when i decide to use them.
aawwww, reminds me of the ole' party days- sharded chonies - flush flush
nice greenhouse too