Filing obligations start the day you distribute · Rules library last reviewed September 19, 2026 · Every rule linked to its official source
Fertilabel / Open data

The rule library, as data

Every rule we publish, in JSON and CSV, with the official source and the date we last read it inside the file. Free, attribution only. Take it and check us.

DOWNLOAD50 OF 50 STATES · REVIEWED September 19, 2026
JSON
data/states.json — the whole library, nested, including the open discrepancies and the reporting-frequency index.
CSV
data/states.csv — one row per state, 17 columns, opens in Excel.
Licence
CC BY 4.0. Use it commercially, republish it, build on it. The one condition is credit: “Fertilabel (fertilabel.com)”.
Updated
Regenerated whenever a rule changes. Every change is listed in the rule changelog, which also has an RSS feed.

Why we give it away

Because the alternative is worse. The four consultancies in this market publish nothing: you call, they quote, and you never see the statute behind the answer. The one free library that exists belongs to the industry association, carries no source per rule and no review date per rule, and its last declared modification is from 2023.

We would rather be the file everyone checks against. If you find us wrong, we would like to know: write to info@fertilabel.com and the correction gets published with its date, like the two we have already made.

What is in it, and what is deliberately not

Per state: agency, licence fee and period, product registration fee and unit, inspection fee per ton, minimum fee, reporting frequency and due dates, late penalty, filing portal, and the official sources.

Absent, not guessed. Where an official source could not be read, the field is empty and the state page says Not verified. Where two official sources disagree, both are in open_discrepancies in the JSON. Today that affects California, Tennessee and South Dakota. An empty field is information; a plausible number is a liability.

Using it in a spreadsheet or a script

EXAMPLESNO KEY, NO SIGN-UP
curl
curl -s https://fertilabel.com/data/states.json
Google Sheets
=IMPORTDATA("https://fertilabel.com/data/states.csv")
Python
pandas.read_csv("https://fertilabel.com/data/states.csv")

One calendar for every state you sell in

The data is free. What we sell is not having to act on it yourself: one calendar, prefilled forms, fees to the cent. You stay the registrant and you file.

Join early access →

The states in the file

COVERAGE50 OF 50
Monthly · $0.75/ton · reviewed 2026-09-18
— · No state fertilizer programme · reviewed 2026-09-19
Quarterly · $0.20/ton · reviewed 2026-09-10
Monthly · $2.40/ton · reviewed 2026-09-07
Semiannual · mill assessment · reviewed 2026-09-04
Annual · $1.10/ton · reviewed 2026-09-02
Annual · $0.25/ton · reviewed 2026-09-19
Semiannual · $0.25/ton · reviewed 2026-09-18
Quarterly · $1.00/ton · reviewed 2026-09-04
Quarterly · $0.60/ton · reviewed 2026-09-02
— · No state fertilizer programme · reviewed 2026-09-19
— · not verified · reviewed 2026-09-10
Semiannual · $0.25/ton · reviewed 2026-09-02
Annual · not verified · reviewed 2026-08-13
Semiannual · $0.17/ton · reviewed 2026-09-07
Semiannual · $1.67/ton · reviewed 2026-09-07
Quarterly · $0.50/ton · reviewed 2026-09-08
Quarterly · $1.00/ton · reviewed 2026-09-08
Annual · No per-ton fee: registration only · reviewed 2026-09-19
Semiannual · $0.25/ton · reviewed 2026-09-18
Semiannual · $0.15/ton · reviewed 2026-09-19
Annual · $0.35/ton · reviewed 2026-09-02
Annual · $1.11/ton · reviewed 2026-08-13
Annual · $0.25/ton · reviewed 2026-09-07
Semiannual · $1.00/ton · reviewed 2026-09-07
Semiannual · $0.25/ton · reviewed 2026-09-10
Semiannual · $0.10/ton · reviewed 2026-09-07
Quarterly · $0.30/ton · reviewed 2026-09-10
Semiannual · $0.37/ton · reviewed 2026-09-19
Semiannual · $0.30/ton · reviewed 2026-09-18
Quarterly · $0.35/ton · reviewed 2026-09-10
Annual · not verified · reviewed 2026-08-13
Monthly · $0.50/ton · reviewed 2026-09-02
Annual · $0.20/ton · reviewed 2026-09-08
Annual · $0.25/ton · reviewed 2026-09-02
Semiannual · $1.00/ton · reviewed 2026-09-08
Semiannual · $0.45/ton · reviewed 2026-09-02
Semiannual · $0.17/ton · reviewed 2026-09-04
Annual · $0.15/ton · reviewed 2026-09-19
Quarterly · $1.50/ton · reviewed 2026-09-18
Annual · $0.15/ton · reviewed 2026-09-08
Annual · not verified · reviewed 2026-09-08
Quarterly · $0.36/ton · reviewed 2026-09-04
Annual · $0.35/ton · reviewed 2026-09-10
Annual · $0.50/ton · reviewed 2026-09-19
Annual · $0.25/ton · reviewed 2026-09-02
Semiannual · $0.35/ton · reviewed 2026-09-02
Quarterly · $0.40/ton · reviewed 2026-09-18
Annual · $0.62/ton · reviewed 2026-09-04
— · No per-ton fee: registration only · reviewed 2026-09-19

This is not legal advice, and it is not a substitute for the state agency. Confirm every figure before you file; the obligation is the registrant's.