Educate me, please, gentlemen. Let's say I want to plant a screen along a road. To best accomplish this, how far apart do I plant the rhizomes and what kind of spacing between rows? is 18-24" between rhizomes, 2 offset 4' rows best?
First no expert, but I'm learning and glad to share. I have plants in N Central MO on the Iowa border that made 30 to 36 inch diameter in year 3. So 3 foot spacing should work fine if your willing to wait. Single row would also work. I only did two rows because I ordered wrong and wasn't wasting them.
If you did two rows on 24 inch centers I don't think you would have a faster screen so much as a really thick screen when it matures.
I planted 4 to 5 feet between rows but now think I should have planted further apart so I could mow between rows during establishment.
how deep should they be planted?
Stu got that one 3 to 4 is fine.
what level of weed control should/must be done?
any fertilizer considerations?
Miscanthus is Atrazine resistant so pre plant I spray Gly and Atrazine. I just hit my last years cuttings with 2-4-DB and atrazine 3 oz per gallon out of a pump sprayer post emergent and they are doing fine. I would imagine straight 2-4D is fine but I had Butyrac on hand.
I have read about guys fertilizing but I don't. I have some at my house that I fertilized one year and they grew tall and thin then fell over in Sept. may not have been the fertilizer but that's what I blamed.
about how much growth in the north in 1 year, 2 years, 3 years (in other words, how long before the screen starts doing some good and how long before it is set)?
Think of it like warm season grass year 1 is sparse, 2 is better, 3 is when it shines. Growing conditions considered.
how many years does it last?
The biofuel guys say 20 years
is there any maintenance to be done?
It should be mowed early spring. Mow it to the ground or burn it. This might be something to try if your getting center die off. This is the first year I've noticed center die off in MO. At home I burn it and haven't noticed that yet on 5 year old plants. Not saying it will work but its worth some more experimentation.
is it an effective screen all winter?
Not much after mid to late January. When the blades fall off all that is left is 1/4 to 1/2 inch bamboo like shoots. 2 rows of those might make a good screen till mowing.
I know that's a lot of ?s, and I could most likely find answers on the web site for the place in MI that sells them, but I'd rather get you guys' real world experience.