July 27, 2018
Hot, dry summer weather can be tough on Kentucky bluegrass and other cool-season grasses. Good cultural practices in late summer can help revive stressed lawns. Important late summer cultural practices include mowing, overseeding, aeration, and fertilization.
In September, lower the mowing height from 3.0 to 3.5 inches to 2.5 to 3 inches. Continue to mow the lawn until the grass stops growing in late October/early November. When mowing the lawn, never remove more than ⅓ of the total leaf area at any one time.
Sunflowers are one of our iconic symbols of summer. Their bright yellow flowers resemble the sun, hence their common name. The scientific name (Helianthus) comes from Helios meaning “sun” and anthos meaning “flower”. Sunflowers also get their name from the plant’s ability to follow or track the sun, a phenomenon known as heliotropism.
There are several Hibiscus species that grow well in Iowa. The Rose-of-Sharon (Hibiscus syriacus) is a common shrub in home landscapes in the southern half of Iowa.
We earlier reported that bagworms have hatched and are feeding on a wide variety of trees and shrubs.
The persistent and destructive Japanese beetle (JB) got a 'jump start' on its activity with the hot temperatures of May and June 2018.
The invasive species of earthworm described in Horticulture & Home Pest Newsletter on May 7, 2017, has now been confirmed in Iowa.
Iowa State University Extension and Outreach will host a monarch and pollinator field day on Aug. 21 at the Prairie Ridge Care Center, 1005 7th Street NE, Orange City.
The program will run from 2:30-3:30 p.m. and includes a field tour of the monarch and pollinator habitat and presentations on establishing monarch and pollinator habitat, habitat assistance and cost share programs and the 4-H Monarchs on the Move program for youth.
Training for new Iowa Master Gardener will take place at 43 Iowa locations this fall. Classes start in September so the time to register is now! Learn more about the Iowa Master Gardener program online and read more about registration in the Iowa State University Extension & Outreach news release from July 12, 2018.
When the Lawn Is Orange or Brown
There are many challenges to growing a turfgrass lawn during the Iowa summer. Read more about turfgrass dormancy, watering, and summer disease in the Iowa State University Extension & Outreach Yard and Garden news release from July 26, 2018.
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