Pennsylvania (PennDOT) standard seed-mix formulas.
Every entry below is a PennDOT standard seeding formula (Publication 408, Section 804) — the seed side of a hydroseed or erosion-control spec, designated by formula letter (B, C, D, E, L, N, W). 7 formulas total. Use them to spec the correct seed mix for Pennsylvania DOT, municipal, and public-works jobs — then find a contractor who installs them. Note: these are seed-mix formulas, not a list of DOT-approved mulch, BFM, or tackifier products.
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| Seed formula | Manufacturer | Category | Longevity | Hydroseed? | Spec sheet |
|---|---|---|---|---|---|
| PennDOT Seed Formula B (Turf/Lawn) | — | — | — | — | |
| PennDOT Seed Formula C (Conservation) | — | — | — | — | |
| PennDOT Seed Formula D (Conservation) | — | — | — | — | |
| PennDOT Seed Formula E (Temporary/Nurse) | — | — | — | — | |
| PennDOT Seed Formula L (Low-Maintenance Fescue) | — | — | — | — | |
| PennDOT Seed Formula N (Native + Wildflower) | — | — | — | — | |
| PennDOT Seed Formula W (Wetland Conservation) | — | — | — | — |
Seed-formula data compiled from PennDOT's standard seeding specification (not an Approved/Qualified Product List). Formulas are state-specific and change over time — always verify against the current PennDOT specification and the project documents before use. Last compiled 2026-08-09. Source: PennDOT Publication 408/2020 Section 804.2(f) Table A (through Change No. 8).
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