Welcome to Washington County Washington County partners with Extension to deliver practical education and research you can use at home, at work and in your community.

Families and growers from across Minnesota will be represented as the University of Minnesota honors them at the 2025 Farm Family of the Year ceremony at 1:15 p.m., Thursday, August 7, at the annual ...

Black knot is a common fungal disease of Prunus trees including ornamental, edible, and native plum and cherry trees. Hard swollen black galls (tumor like growths) form on branches and occasionally on ...

Extension researchers and educators engage individuals and organizations in asking the challenging questions to discover science-based answers that make a difference.

Animal manure is a great source of nutrients for crops, but it is also complicated. Luckily, one of the complications is something that can be controlled: manure application method. As a reminder, ...

Photos of weeds and weed seedlings commonly found in Minnesota crop production ...

How to inventory your field, to find a yield-maximizing variety A guide to seed quality, maturity and other key factors. Buying tips: How many varieties to purchase, traits to ignore and more. List of ...

How to control trees and woody shrubs that may be a problem in your landscape such as Amur maple, buckthorn, Norway maple and others.

Flooding may cause direct damage to trees and also can weaken trees, making them more susceptible to damage from insects and diseases. A tree in weak condition before a flood can be further stressed ...

Burning bush (Euonymus alatus), also known as winged burning bush or winged Euonymus, is a popular exotic landscape plant that can become invasive. Burning bush is a Restricted Noxious Weed; it is ...

Staking and mulching plants, and pinching off infected leaves can keep leaf spot diseases in check.

Olmsted County partners with Extension to deliver practical education and research you can use at home, at work and in your community.