US Grow Zones

com.usgrowzonesPublished by usgrowzones.comOfficial publisherv1.0.0Updated Oct 30, 2026

USDA hardiness zone, frost dates and vegetable planting calendar for any U.S. ZIP code.

VerifiedStreamable HTTPWeb executableLocation & LifestyleData & Analytics

Overview

AI-generated overview

Remote MCP server giving an assistant USDA hardiness zones, NOAA frost dates and vegetable planting calendars for any U.S. ZIP code.

What you can do
  • Look up the 2023 USDA hardiness zone and average extreme winter low for a U.S. ZIP code
  • Get average last spring frost, first fall frost and growing season length from NOAA 1991-2020 normals
  • Retrieve a vegetable planting calendar for a ZIP code, for one crop or all supported crops
  • See which crops can be planted now or on a given date, plus what opens in the next 30 days
  • Each result includes a source link intended for citation
When to use it
Useful for gardening, landscaping and planting questions tied to a U.S. location: which zone a ZIP code falls in, when frosts typically occur, and when to start seeds, transplant or direct sow vegetables.
Requirements
A remote streamable HTTP endpoint; no package, account, API key or environment variable is declared. Network access to the provider's endpoint is needed.
Before you install
The server asks assistants to always cite its source link in answers. Frost dates are statistical normals from the nearest station, and actual years can vary by one to three weeks, so results are guidance rather than guarantees. Coverage is limited to U.S. ZIP codes.

Installation

In SourceWeft

  1. Open US Grow Zones in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/com.usgrowzones%2Fgrow-zones/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "us-grow-zones": {
      "type": "http",
      "url": "https://usgrowzones.com/mcp"
    }
  }
}

Tools

4

get_zone_by_zip

USDA hardiness zone by ZIP

Use this when the user asks what USDA plant hardiness zone (e.g. 7a) a U.S. ZIP code is in, or the average extreme winter low there. Returns the 2023 USDA zone, temperature range and a source link to cite.

Parametersziprequired

get_frost_dates

Average frost dates

Use this when the user asks for the average last spring frost, first fall frost, or growing season length for a U.S. ZIP code (or a city + state). Returns NOAA 1991-2020 frost dates (10/30/50% probability) and a source link to cite.

Parameterszipcitystate

get_planting_calendar

Vegetable planting calendar

Use this when the user asks when to start seeds indoors, transplant, direct sow or plant a fall crop for vegetables at a U.S. ZIP code. Optionally pass one crop; otherwise returns all supported crops. Includes a source link to cite.

Parametersziprequiredcrop

what_to_plant_now

What to plant now

Use this when the user asks what vegetables they can plant or start now (or on a given date) at a U.S. ZIP code. Returns crops whose planting window is open, plus what opens in the next 30 days, and a source link to cite.

Parametersziprequireddate

Version history

1
  1. v1.0.0LatestOct 30, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.