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Iowa State University Extension & Outreach

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yardandgarden.extension.iastate.eduAmes, Iowa, United StatesUpdated

Iowa State University Extension & Outreach provides science-based gardening information, outreach, and diagnostic services to homeowners and commercial producers statewide.

Overview

Iowa State University Extension & Outreach (ISU Extension) provides science‑based gardening information, outreach, and diagnostic services to homeowners, hobbyists, and commercial producers across Iowa. The Yard and Garden site is a central hub with thousands of articles and resources on trees and shrubs, flowers, edibles, lawn and turf, houseplants, and garden management, designed to support informed, sustainable decisions. It connects the public with Extension specialists and Master Gardeners, and offers opportunities to engage through newsletters, publications, and the Master Gardener program. A core facet is the Plant and Insect Diagnostic Clinic (PIDC), a joint effort of ISU Extension & Outreach and ISU departments to diagnose plant health problems and identify insects. The organization also operates a statewide network of county extension offices and field specialists that provide local, practical guidance to commercial producers and residents alike. Through research‑based guidance, training, and outreach, ISU Extension & Outreach aims to help Iowans grow healthy plants, improve landscapes, manage pests responsibly, and access reliable horticultural expertise.

Mission statement

Iowa State University Extension & Outreach is dedicated to delivering research-based horticulture information, education, and diagnostic services that empower Iowans to grow healthy plants and maintain sustainable landscapes, supported by a network of extension professionals, diagnostic clinics, and community partners.

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What we offer

Plant & Insect Diagnostic Clinic

Service

Offers expert diagnosis of plant diseases and insect identification, crucial for maintaining healthy gardens.

Pricing not published

yardandgarden.extension.iastate.edu/pidc

Extension Publications

Access a variety of home gardening resources through Extension Publications.

Pricing not published

yardandgarden.extension.iastate.edu/publications

Master Gardener Program

Service

Enhance gardening skills with comprehensive training and community engagement.

Pricing not published

www.extension.iastate.edu/mastergardener/

Market segments

Market size by segment

Growth potential (CAGR)

Home gardening information

1 Billion USD7% CAGR

Research‑based articles, publications, and downloadable guides that educate homeowners and hobbyists on plant selection, care, pest management, and sustainable landscape practices.

Products: Extension Publications, Master Gardener Program

Plant diagnostic services

5.1 Billion USD8.1% CAGR

Laboratory and expert diagnostic services that identify plant diseases, insects, nematodes, and abiotic problems and provide management recommendations; includes sample submission, microscopy, and molecular testing.

Products: Plant & Insect Diagnostic Clinic

Master gardener programs

0.2 Billion USD4% CAGR

Training, certification, volunteer coordination, and community outreach programs that train citizen educators and connect the public with horticultural expertise and local projects.

Products: Master Gardener Program, Extension Publications

Agricultural advisory and farm management

9 Billion USD12% CAGR

Advisory services that optimize agronomy, irrigation, post-harvest operations, input finance, and market/export readiness to improve yields, reduce loss, and meet buyer standards.

Products: Extension Publications, Plant & Insect Diagnostic Clinic

More information about our offering

Plant & Insect Diagnostic Clinic

Plant & Insect Diagnostic Clinic (PIDC) provides diagnoses of plant health problems and identification of insects. It is a joint effort of ISU Extension & Outreach and ISU departments of Horticulture, Plant Pathology, Entomology, and Microbiology, supported by ISU units. Services include diagnosing plant diseases and insect damage, insect identification, and guidance for management; submissions require a completed form and may incur fees. A sample tracker and submission forms are available, and out-of-state samples may incur a surcharge.

Pricing not published

  • Receive Accurate Diagnoses
    Get precise diagnoses for plant issues, helping to implement effective management solutions.
  • Access Combined Expertise
    Benefit from the combined expertise of multiple ISU departments dedicated to plant and insect health.
  • Understand Costs Before Submission
    Clients are informed about applicable fees ensuring transparency before submitting samples.
  • Simplify Sample Submission Process
    Easily submit samples online; proper forms ensure accurate diagnosis and analysis.

Extension Publications

Extension Publications are a collection of home gardening materials offered through the ISU Extension Store. Some publications are free downloadable PDFs, while others are available for purchase.

Pricing not published

  • Offers Free PDF Downloads
    Easily download essential gardening guides at no cost, ensuring accessibility for all gardeners.
  • Covers Diverse Gardening Topics
    From fruits to pests, explore extensive information to enhance your gardening knowledge.
  • Links to Extension Resources
    Access supplementary materials and tools directly from the Extension Store to further your gardening efforts.
  • Available for Purchase
    Invest in in-depth guides and resources for serious gardeners through the Extension Store.

Master Gardener Program

Master Gardener Program is an ISU Extension & Outreach program referenced on Yard and Garden, offering training and resources related to gardening education and outreach.

Pricing not published

  • Access Learning Anytime
    Flexibility to learn at your own pace with a variety of online courses and resources tailored to home gardening.
  • Engage with Your Community
    Participate in local events, workshops, and gardening programs that support community development and environmental stewardship.
  • Learn from Experts
    Connect with knowledgeable professionals who provide tailored advice and diagnosis for gardening challenges.
  • Research-Based Information
    Leverage up-to-date horticultural information to make informed gardening decisions and improve plant health.
  • Make a Difference
    Become an active participant in community gardening efforts, enhancing your skills while serving others.

Sources

Methodology and sourcing behind the figures and links shown above.

Home gardening information

Estimation based on lawn & garden market scale in the search results (US retail ~$79B in 2025; US retail ~ $94B in 2026; global gardening tools ~$98B in 2025) and one report naming a global home gardening market projection ($26.47B by 2034). Home gardening information (research articles, guides, subscriptions, ad-supported content, paid reports) is a small, specialized share of total consumer spend—assumed ~1% of the broader lawn & garden market globally, giving an order‑of‑magnitude estimate of about $1B. Growth potential is higher than many physical product categories due to digital distribution, search/video learning adoption, and unmet knowledge barriers (surveyed gardeners cite knowledge as a major barrier), so a mid‑single-digit to high‑single‑digit CAGR (~7%) is applied.

Plant diagnostic services

Primary estimate uses Persistence Market Research (covers plant disease/diagnostics broadly, including laboratory and molecular testing) which reports a global market of US$5.1B in 2026 and an 8.1% CAGR to 2033. Other sources report a range (ResearchAndMarkets/GlobeNewswire: $1.69B in 2023 to $2.68B by 2028, CAGR ~9.7%; FutureMarketInsights: a narrower phytopathological diagnostics subsector at USD 109.9M in 2025, CAGR 4.5%; TBRC/The Business Research Company: USD 0.76B in 2025, CAGR 7.6%), reflecting definitional and scope differences (services vs. kits/devices vs. broader monitoring). Persistence’s scope best matches the requested services-focused segment, so its figures were used as the primary estimate.

Master gardener programs

Search results contained no explicit market-size or CAGR data for master gardener programs. I estimated size using sector context: U.S. master gardener/extension networks (order of 0.1–0.2M volunteers nationwide), typical county/state extension program budgets and modest fee/grant income per program, and the small share these programs represent of the wider U.S. lawn & garden market. Aggregating program budgets, fee revenue, grants, and supported services yields an estimated market ~$200M. Growth is expected to be modest (stable volunteer recruitment, rising interest in home gardening/community resilience), yielding an estimated CAGR around 3–5% (rounded to 4%).

Agricultural advisory and farm management

Estimate combines reported farm management software (USD 3.2–3.93B) and Farming-as-a-Service (USD ~5.0B) plus relevant services within the broader digital-agriculture market (USD 26.15B). Advisory and farm-management services sit between pure software and full digital-agriculture offerings; summing the software (~3–4B) and service/FaaS (~5B) components and taking a conservative midpoint yields ~USD 9.0B. Growth potential reflects reported CAGRs for related segments (11–17%); a blended, service-heavy segment CAGR of ~12% is used as a central estimate.

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