Although I'm
dubious about the benefits of planting comfrey underneath fruit trees
as a living mulch,
I've had great luck cutting comfrey from standalone plants to mulch the
vegetable garden. The high nitrogen leaves break down nearly as
quickly as grass clippings do, so they act as a combination of
top-dressing and weed control (with a bit more emphasis on the former
than the latter.) This shot was taken about a week after adding
the leaves to the ground, but it rained for most of the week and the
comfrey didn't wilt until last Friday. The softest parts of the
leaves are already starting to disappear into the soil four days after
wilting.
I estimate I'd need
about 600 comfrey plants, or a square planting 37 feet on each side, to
grow all of the mulch for my vegetable garden. If I had a better
way to harvest them than cutting with scissors, I might be tempted to
devote the space to these dynamic accumulators. As it is, my
dozen plants are all I can handle.
You could try a sickle or a scythe. I just got one of each, with Austrian-style blades. It took a little adjusting and a lot of learning--especially with the scythe--but it's great for harvesting things in stands such as rye-grain or mint.
Of course, the scythe was fairly expensive, but you can find used sickles on eBay for under $50. The sickle is easier to learn to use, too.
I love both tools... especially because they don't require parts and gasoline like a lawnmower or a weedwhacker!
Faith --- learning to use a sickle and/or scythe well is on my list for the next year or two. However, I don't think they would work for comfrey, since you need to cut very close to the ground, and would have to lift up the leaves to get a blade in there. I could be wrong, though --- like I said, I'm still very new to those tools!
De --- That's what I've been thinking --- using the mulching mower with the blade set as high as it would go. Mowing it once every week or two would be awesome.
I use a Japanese rice knife, also called a kama. It's like a sickle, but smaller and with serrations along the inside curve of the blade.
It's great for cutting grass along edges, harvesting stuff like comfrey for mulch or chicken feed, hacking back foliage for chop-n-drop mulching, etc.
You can see a photo of one on this site: http://www.greenharvest.com.au/tools/pruning_tools_prod.html
(I bought mine from them, but have no other commercial connection to that site)
Darren --- Interesting! Now I have yet another tool I want to see in use... Clearly, you should make a youtube video and post it on your blog --- I'll bet I'm not the only one who hasn't heard of it.
Faith --- I think that you'd have an easier time cutting grasses or other things with vertical stalks at ground level than comfrey. Since the leaves arch out in a vase shape, I would think that a scythe would get tangled up before reaching the stalks. But I could be wrong!