What’s in Bloom and Related Information

Although bloom times are directly related to the weather, the chart below displays the usual times for the listed plants to bloom in Boerner Botanical Gardens.

Since 2007, Master Gardener Volunteers working with the UW-Extension Horticulture Center at Boerner Botanical Gardens have been recording blooms in the Perennial Garden.

To see detailed records for more than 2,000 perennial plants, please select from the following:

2023 Blooms in the Garden Report

2022 Blooms in the Garden Report

2021 Blooms In the Garden Report

2020 Blooms In the Garden Report 

2019 Blooms In the Garden Report



Perennial Map

Rose Garden Map

Rock Garden Map

Tree and shrub collection information is available upon request.
Please call (414) 525-5601.

Plant Heath Advising Program

Plant Health Advising Help Desk
Lawn & Garden Questions?
Serving Kenosha, Milwaukee & Racine Counties

Get your lawn & garden questions answered by our WI Master Gardener Volunteers serving at the Plant Health Advising (PHA) Offices in Kenosha, Milwaukee and Racine Counties in Wisconsin.


Plant diagnosis, plant disease testing*, garden related insect identification, soil testing*, landscape & gardening info and plant identifications.

*costs associated for testing, call/email for more information.

Call 608-298- 6945 (April – October, Monday-Saturday 10:00 a.m. – 4:00 p.m.)

Email: planthealth.advisors@extension.wisc.edu

Walk-in Diagnosis PHA Locations

(Hours vary by location, call or email prior to visit):

• Kenosha County: 19600 – 75th Street, Suite 2, Bristol, WI 53104

Milwaukee CountyBoerner Botanical Garden, 9400 Boerner Drive, Hales Corners, WI 53130

Racine County: Racine County Ives Grove Offices 14200 Washington Ave. Sturtevant, WI 53177

Plant & insect sample Drop Box: Located in front counter at the PHA offices in Kenosha, Milwaukee and Racine County. Opening and closing hours at each location varies; call or email prior to visit.