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4 inches deep, laid horizontally with any obvious growth facing upwards, and one to a hole. If needed, in sandy soil conditions, light mulch to help hold moisture on the ground is helpful.
Poke some holes in the bag so that they can breathe a little and put them in the fridge. The cold slows the growth.
Upon planting, the rhizomes can take up to three weeks to emerge if they were planted dormant.
The first year growth of an individual rhizome is 2-3 stalks, 3-4ft tall. The second year you get an average of 7 stalks, 6-7ft tall. And the third year the cluster’s diameter will be approximately 14", with about 25 stalks at full height.
Let the first couple of frosts brown the plant so it can pull nutrients back down to the rhizomes. You may cut it back any time during the winter or spring before the new growth pushes up in April/May.
What we have been suggesting is two rows spaced 18" apart with the rhizomes planted staggered every 18", so basically you're planting a rhizome every 9". This will give you a solid wall the third year.
The best preparation is to till the bed in the fall. Spray Roundup after the emergence of weeds and grass in the spring, and then another single till. I would wait with any broad leaf weed control until a couple of weeks after the Miscanthus emerges.
As a matter of fact, yes it does. Since we leave the crop standing until March to dry, we see evidence of the deer coming and going out of the field many mornings by the way of new prints in the snow. We see them bedding down.
The first 6 foot section was tilled and then will be sprayed with Glyphosate (a systemic herbicide) every 30 days. The second section is only going to be sprayed every 30 days. The third section will only be mowed every 30 days. Test began on June 7th, 2016.
5 year-old established miscanthus.
Tilled, sprayed, and mowed miscanthus.
Thirty days later.
Thirty days later - remowed and resprayed,
now including the new growth of
the tilled section.
Sixty days from start of test.
Remowed and resprayed.
Three applications of Glyphosate every thirty days is looking like the best method to kill the established miscanthus stand. Pre rototilling the clusters in the spring did not serve any advantage. They still had to be sprayed three times. Mowing also did not seem to be an advantage. It held the growth down but did not completely kill it in one summer.