MNL Septic Mound Mix

Designed to provide stable, ground cover in poor quality septic mound soils 

Specially designed with great species for poor-soil septic mound and drainfield areas.  The University of Minnesota recommends native grasses and wildflowers for septic mounds to improve soil stability and providing a cover to limit frost depths. 

Seed mixes in our 500, 1,000, 5,000, and 1/4 acre package sizes come with native grasses, wildflowers, cover crop, and a filler (for easier spreading) all pre-mixed. Orders in 1/2 acre or 1 acre+ sizes come with grasses, wildflowers, and cover crop bagged separately for drill seeding or broadcast seeding.

Species of cover crop seed will depend on the time of year the product is ordered – if you order ahead and have a delayed planting time in mind, please indicate planting season (spring, summer, fall, or winter) in a note at check out.


Click here for tips on seeding your own project!


Septic Mound Mix

Common NameScientific NameType of Plant% of MixBloom Season
Side-Oats GrammaBouteloua curtipendulaGrass31.25
Blue GrammaBouteloua gracilisGrass6
Prairie BromeBromus kalmiiGrass5
JunegrassKoeleria macranthaGrass.25
Little BluestemSchizachyrium scopariumGrass23
Prairie DropseedSporobolus heterolepisGrass2
Bicknell's SedgeCarex bicknellii Sedge2.5
Prairie OnionAllium stellatumForb1Summer
Butterfly MilkweedAsclepias tuberosaForb1.6Summer
Partridge PeaChamaecrista fasciculataForb3.5Fall
White Prairie CloverDalea candidaForb4Summer
Purple Prairie CloverDalea purpureaForb6Summer
Narrow-leaved ConeflowerEchinacea angustifoliaForb1Summer
Rattlesnake MasterEryngium yuccifoliumForb.95Summer
Common Ox-Eye SunflowerHeliopsis helianthoidesForb4Summer
Round-headed BushcloverLespedeza capitataForb.5Summer
Rough Blazing StarLiatris asperaForb.5Summer
Wild BergamotMonarda fistulosaForb.25Summer
Spotted Bee BalmMonarda punctataForb.25Summer
Slender BeardtonguePenstemon gracilisForb.2Spring
Large Flowered PenstemonPenstemon grandiflorusForb.5Spring
Long-Headed ConeflowerRatibida columniferaForb1.5Summer
Black Eyed SusanRudbeckia hirtaForb1.25Summer
Stiff GoldenrodSolidago rigidaForb.25Fall
Smooth Blue AsterSymphyotrichum laeveForb.5Fall
Sky Blue AsterSymphyotrichum oolentangienseForb.75Fall
Ohio SpiderwortTradescantia ohiensisForb.5Spring
Hoary VervainVerbena strictaForb1Summer

MNL Septic Mound Mix


Seed mix contents likely to vary slightly throughout the growing season. Actual seed mix composition will be listed on seed tag at time of delivery.

MNL produces premium, local origin native seed.  All of our native seed is tested for noxious weeds and certified to be of local origin.  It is also tested for germination and purity, allowing us to sell it as “Pure Live Seed” (PLS).  This assures you are only paying for viable seed.