The ideal bag size would be approximately 10-15 cm (4"-6") diameter and 30 cm (12") depth. I can't simply use 'bigger' bags due to the large number of seedlings and the soil/weight requirement.

I googled "tree nursery supplies" but didn't find the tall bags I'm looking for. I know they exist because I saw them on a YouTube video a few months ago.

Thanks,
John

Here is another source: http://www.groworganic.com/plastic-nursery-grow-bags-quart.html

Google 'plastic poly grow bags' for many other sources.

Dave

Thanks,
John

and Rootmaker http://www.arborday.org/shopping/trees/TreeDetail.cfm?ID=269

but they are quite a bit more expensive. The easiest and least costly I know of are the ones I linked above. You just roll them into a tube of whatever size you want depending on the size of your cuttings, stand it up, separate the sides into one chamber with a bottom, and fill 1 chamber of the tube. For example the 1 gallon bags are 10" tall so rolled in 1/2 you end up with 3" in diameter, 10" tall tube.

You can also make your own rooting tubes out of any 3-4mil thick roll of plastic. Just cut a piece in the dimensions you want (height x finished diameter), turn it into a tube, overlap and tape the edges with duct tape, fold in the bottom like and envelope to seal it off, and melt in drain holes with any hot metal object - I use a soldering iron.

Hope this helps.

Dave