Yes considered an invasive species around here by some.It's on our "National Environmental Alert List" as a "Weed of National Significance"
Don't know about the seed thing and think mainly by rooting. When you harvest it it just snaps off at the base with roots intact. A local told me if you chop a plant up into pieces, lay on the ground, cover with some dirt and water or put covered in an area that's very moist, the little pieces will grow new plants. That's why I said before if you use in composting only when hot composting to ensure no regrowth. As I also said...once it starts growing somewhere forget about getting rid of it. Snake Grass roots can be found 3+ feet underground...spreads easily.will the seeds not spread anyway on the wind, even in pots? or do they reproduce from the roots only?
start with 1:20 tea:water for foliars.
That's good info. Another plant to watch out for when collecting is Foxglove (Digitalis purpurea). I've seen instances where companies bought bulk herbs for use in manufacturing that was contaminated with Foxglove and 1 customer almost died. Pretty sure the digitalis in it pulls potassium out of the heart or something like that.
One thing I've been eying recently to harvest for composting are full grown ferns...lots around here. I've eaten fiddleheads so did a bit more research...
There's the potassium thing again
Honestly never really looked at nutritional profiles for wild herbs/weeds. Only testing I've done is for sap on Chickweed and posted those results. I do know the K thing is pretty much across the board though especially the N:K ratio with K being much higher. I dunno about the 'low value of other nutrients' thing though as comfrey is high is calcium and phosphorous from what I understand. Weeds/herbs seem to be adept at extracting minerals form the soil.was reading a section on weeds in an og lawn care manual... noticed that ALOT of the weeds listed indicate HIGH potassium while indicaticating low values of other nutrients.
just an observation.
dont think its P comfrey is known forI dunno about the 'low value of other nutrients' thing though as comfrey is high is calcium and phosphorous from what I understand.