What do you want duckweed for? Our pond gets covered with it. I have to keep straining some off to let some oxygen in to the pond. I wouldn't mind sending you some a little later in the season. It is too snowy to get down to the pond now, which is at the bottom of a steep hill. I think it would have to be sent in a bottle of water, otherwise you would receive nothing but dry powder at your end.
I think the stuff is a menace, except that it is wonderful to put in the compost pile. Heats it up like magic!
Actually, I looked it up to be sure, and what I have is actually watermeal. It is in the duckweed family, but even smaller:
Duckweed and watermeal plants are very small, with watermeal being the smallest flowering plant known to exist. While the individual plants look like leaves, they are not true leaves and are often called fronds. Duckweeds are typically less than 1/4 inch in width, with some species not even exceeding 1/8 inch in size. Watermeal is considerably smaller, being about 1/32 of an inch in width or about the size of a pinhead. Duckweeds, including watermeal, generally reproduce by a process called budding in which a new daughter bud is produced every day or so. In two weeks under ideal summer growth conditions, a single parent plant and its subsequent "daughters" can result in the production of up to 17,500 plants. It is this very rapid budding process that allows duckweeds to quickly cover a pond in just a few weeks.
Just a small project ive got going on in a stock tank. When its complete ill share but until then im keeping it underwraps. Im going too use the duckweed as coverage along with water iris, and between the two i should get decent biological filtration, along with monthly water changes.
The duckweed is going too getting ate by the critters in the tank as well. This stuff grows wild here but ive only seen it in ponds and in marshes and id rather get some legit than trespass for some.
My Apache and Ouachita blackberry twigs both came in!!!!