Switchgrass and other native grasses-Wildlife (Code #SGW)
Soil Test RatingPotassium

Low K

Coast: 0-30 lbs/A

Pied: 0-50 lbs/A

Medium K

Coast: 31-60 lbs/A

Pied: 51-100 lbs/A

High K

Coast: 61-150 lbs/A

Pied: 101-200 lbs/A

Very High K

Coast: 150+ lbs/A

Pied: 200+ lbs/A

PhosphorusRecommended Pounds N-P205-K20 per Acre

Low P

Coast: 0-15 lbs/A

Pied: 0-10 lbs/A

*-80-80*-80-50*-80-0*-80-0

Medium P

Coast: 16-30 lbs/A

Pied: 11-20 lbs/A

*-50-80*-50-50*-50-0*-50-0

High P

Coast: 31-60 lbs/A

Pied: 21-40 lbs/A

*-0-80*-0-50*-0-0*-0-0

Very High P

Coast: 60+ lbs/A

Pied: 40+ lbs/A

*-0-80*-0-50*-0-0*-0-0

Coast = Coastal Plain    Pied = Piedmont, Mountain, and Limestone Valley

Recommendations:

Recommended pH:5.5. If the pH is less than 5.5, see Lime Table D.
Nitrogen:50-75 pounds nitrogen (N) per acre
Magnesium:

If soil test Mg level is low and lime is recommended, use dolomitic limestone; if soil test Mg is low and lime is not recommended, apply 25 pounds of Mg/Acre.

Coastal PlainLow: 0 - 30 lbs/acre Medium: 31 - 60 lbs/acre High: >60 lbs/acre
Piedmont Low: 0 - 60 lbs/acre Medium: 61 - 120 lbs/acre High: >120 lbs/acre

Fact Sheet:

Though it is not as high-yielding when soil fertility is low, switchgrass is very tolerant of low fertility. Even so, if switchgrass is grown for wildlife purposes, some soil amendments may be necessary to maintain the soil pH at 5.5 or greater and with medium-low soil test P and K values. If P and K fertilizer is recommended, it should be applied in the establishment year only. Little, if any, additional N will be necessary.