Garden & Yard Issues

All Garden & Yard Issues Content

Two broccoli plants exhibiting early black rot symptoms.

Black Rot of Brassica Crops

Black rot is an uncommon, but devastating bacterial disease in South Dakota that can develop during extended periods of hot and wet weather, leading to rapid and widespread crop loss.

Dark-green gelatinous masses on a patch of grass.

Nostoc is a genus of cyanobacteria that form colonies in gelatinous masses. In South Dakota, it commonly appears in home lawns, notably in patches where grass is not growing, especially after periods of rain.

West Nile Virus Update: October 16, 2025

As of October 16, 2025, the South Dakota Department of Health reported 86 human cases of West Nile virus from Aurora, Beadle, Bon Homme, Brookings, Brown, Charles Mix, Clay, Codington, Corson, Douglas, Grant, Gregory, Haakon, Hamlin, Hand, Hughes, Hutchison, Hyde, Lawrence, Lincoln, Marshall, Meade, Miner, Minnehaha, Pennington, Roberts, Sanborn, Spink, Stanley, Todd, Union, Walworth, and Yankton counties.

Tree Pest Alert

From seasonal issues and timely recommendations to disease diagnosis and expert advice, the Tree Pest Alert is a trusted resource for selecting, planting and caring for trees and shrubs all year round.

A group of raised ground beds with crops growing in them at McCrory Gardens in Brookings, South Dakota.

Garden Hour

Make the most of your garden and landscaping with weekly insights and ideas from our team of experts.

green tomato with a rotten spot showing blossom end rot

Problems and Solutions

Not finding the gardening or horticulture resource you need? Use the Ask Extension tool to submit your question.

Northern Corn Rootworms on sunflowers, zinnias, and dahlia flowers.

Corn Rootworm Presence in Cut Flowers

Multiple cut flower farms in Eastern South Dakota have reported corn rootworms on a variety of crops, including sunflowers, zinnias, and dahlias. Careful attention to species present, their timing, and the damage they cause can help inform integrated pest management strategies.

Examples of Wild violet, Creeping Bellflower, and Ground Ivy growing on a lawn.

Perennial Weed Control in Lawns and Turf With Fall Herbicide Applications

Early fall is great time to control perennial weeds in lawns, including Wild violet, Creeping Bellflower, Ground Ivy, and Canada Thistle. Learn some expert tips selecting the right herbicides to manage these difficult-to-control weeds this fall.

Yellowjacket feeding on decaying produce.

Yellowjackets: Swarming decaying produce or garbage near you

Fall is here, and if you have a garden, fruit trees, or outdoor dumpsters, you are likely to encounter yellowjackets in search of food. Learn some expert tips to avoid getting stung this fall.

West Nile Virus Update: September 26, 2025

As of September 26, 2025, the South Dakota Department of Health (SD DOH) reported 74 human cases of West Nile Virus from Aurora, Beadle, Bon Homme, Brookings, Brown, Charles Mix, Clay, Codington, Corson, Douglas, Grant, Gregory, Haakon, Hamlin, Hand, Hughes, Hutchison, Hyde, Lawrence, Lincoln, Marshall, Meade, Miner, Minnehaha, Pennington, Roberts, Sanborn, Spink, Stanley, Union, Walworth, and Yankton counties.