Market Farming

[sora AT coldreams.com]

 Flip the
>>bag open and fill it, set them side by side and they become
>>squarish, filling all the space in wahtever box or flat you use. Very
>>cheap, so fine to give away without a big cost. Quite easy to save
>>and reuse, needing very little storage space. Are they available in
>>the US?
>
Aren't these what are called "grow bags"?  I've seen them used alot for
larger plantings...1 gal plus......There's an operation in British
Columbia that does a huge operation with hot house tomatoes and English
Cucumbers all in "grow bags".  A source would be great........