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Delayed intervention is more expensive.

Rising costs of delayed intervention

Leaving knotweed untreated for just one growing season can add 50% – 200% to remediation costs. Early detection and response (EDRR) typically saves thousands of dollars per site, especially before the infestation spreads under hardscape or structures. Data shown in $1,000s of dollars.

Invasion curve

Early detection and response can save thousands of dollars and protect your land’s long-term value. Acting quickly prevents infestations from spreading beyond your property, where control costs multiply and options narrow. The invasion curve is a reminder that waiting not only makes eradication harder - it makes it more expensive.

Enroll as a Steward

Stewards are the backbone of our effort to protect landscapes from invasive species. Whether you manage a trail, farm, forest, or backyard, you can play a vital role in responding to early threats.