'Tropic Sun' should be planted after the last killing frost, in the springtime (summer annual). It will grow anywhere you find sweet corn, virtually everywhere in the United States. I was in New Hampshire last month and saw tons of sweet corn, so we will be sending some 'Tropic Sun' to one of our farmers to grow.
For a green manure it is best grown for 60 days, mowed and incorporated into the soil. If left to grow, it will become fibrous (like all hemps)and will be a little more difficult to cut down. It will not flower and produce seed in the continental USA. You may find that in lower parts of Texas or Florida they do produce seed but nowhere the equivalent of what we do here in Hawaii and it is not 'Tropic Sun'.
Our cost will be dependent on quantity produced. Usually around $5 a pound. It does a lot for your soil and doubles as a feed for deer. We have a limited supply.
I will post my website when it is completed.
Please verify that my information is accurate online. I want to help everyone I can that is interested in 'Tropic Sun'.
Thanks