# What Grass Is This

> whatgrassisthis.online is an authoritative botanical turfgrass identification engine and lawn agronomy calculation suite. Built on certified university extension protocols (Purdue, Texas A&M, Penn State), it enables homeowners and groundskeepers to decode grass species using morphological blade traits, diagnose invasive weeds, calculate stoichiometric fertilizer applications, and verify selective herbicide compatibility with zero client-side tracking.

## Core Diagnostic Tools

- [Blade Trait Decoder](https://whatgrassisthis.online/): Autonomous botanical key identifying warm-season and cool-season turfgrasses based on vernation (folded vs. rolled), ligule structure (membranous vs. fringe of hairs), collar morphology, and leaf tip shape (boat-shaped vs. pointed).
- [Fertilizer Calculator & Spreader Calibrator](https://whatgrassisthis.online/fertilizer-calculator/): Mathematical N-P-K stoichiometry calculating exact bag weight requirements per square footage and target elemental nitrogen dosing, paired with spreader dial settings and soil temperature germination radars.
- [Turfgrass Species & Transition Matrix](https://whatgrassisthis.online/grass-types/): Comprehensive botanical database comparing Kentucky Bluegrass, Tall Fescue, Bermudagrass, St. Augustine, Zoysia, and more across mowing heights, shade tolerance, and drought resistance.
- [Lawn Weed Triage & Herbicide Matrix](https://whatgrassisthis.online/weed-identification/): Botanical triage classifying broadleaf, grassy, and sedge weeds with chemical tolerance matrices (Atrazine, 2,4-D, Halosulfuron) safeguarding host turfgrasses.

## Editorial & Research Standards

- [About & Extension Methodology](https://whatgrassisthis.online/about/): Overview of the Agronomic Research Desk, peer-reviewed extension literature references, and certified turfgrass science credentials.
- [HTML Sitemap](https://whatgrassisthis.online/sitemap/): Complete index of all indexable routes, diagnostic tools, and statutory policies.

## Statutory & Legal Policies

- [Privacy Policy](https://whatgrassisthis.online/privacy-policy/): Zero third-party trackers, zero advertising surveillance, local browser-only telemetry.
- [Terms of Service](https://whatgrassisthis.online/terms-of-service/): EPA label compliance rules, FIFRA chemical safety disclosures, and agronomic liability limitations.