Waukesha County

Spring Sale Pick Up & Workshop Event

Pick up your pre-ordered plants or shop a limited supply of plants. Stay for a workshop, from 9am - 1pm on April 29th at Retzer Nature Center.

Spring Sale & Workshop Event

FREE Workshops - Pre-registration available!

Sat., April 29. 9 am - 1 pm
Rain or Shine
Retzer Nature Center

Rain Gardens and Rain Barrels  8:30 - 9am  Discover how rain barrels can help restore a more natural water flow while saving you money, and how to install one.  Learn about rain gardens - their benefits, function, plant choices and basic installation tips. 
Home Composting Workshop  9:15 - 9:45am  Learn how to create compost, how to use it, the "hot or cold" method, and different bin styles to build or buy.  Discover the secrets of healthy soil for beautiful lawns & gardens and the role compost plays. 
Native Plant Landscaping  10 - 10:45am  Discover the best way to bring natural plantings to life on your property.  We'll cover the pros and cons of different planting approaches, what your natural areas should look like over the first several years, grouping vs. separating, plant choices based on soil-type, seedlings, and more. 
Native Wildflower Walk  11 - 11:45am  Join the Retzer Nature Center naturalist for an up-close & personal exploration of some of our native wildflowers in their native habitat.  See newly-blooming wildflowers bordering the trail through the spring forest ground-layer.  Come away with an admiration for these hardy perennials as we discuss the fascinating lives of these plants. 


Compost Bins and Rain Barrels

  • Single Rain Barrel and Diverter: Includes a 55 gallon recycled food-grade barrel (usually blue) and a Rain Reserve diverter kit.
  • Tandem Rain Barrels and Diverter: Includes 2-55 gallon recycled food-grade barrels (usually blue) and a Rain Reserve diverter kit with two connecting hoses and spigots.

Rain Reserve diverter kit with two connecting hoses and spigots (included with Rain Barrels). 

Compost bin: The Home Composter is made of 100% recycled plastic with snap-lock construction, large capacity of 13 cubic feet, 36 x 30 assembled size, fits in most cars, dual slide-up doors and large locking lid. Composting book included. 


Common Plants

Black-Eyed Susan (Rudbeckia hirta)    Butterfly Weed (Asclepias tuberosa)     
Cardinal Flower (Lobelia cardinalis   Common Milkweed (Asclepias syriaca)     
Culver's Root (Veronicastrum virginicum)   Early Sunflower (Heliopsis helianthoides   
Golden Alexander (Zizia aurea   Great Blue Lobelia (Lobelia siphilitica)    
Heart-leaved Golden Alexander (Zizia aptera   Hoary Vervain (Verbena stricta)   
Ironweed (carex bicknelli)   Jacob's Ladder (Polemonium reptans   
Meadow Blazing Star (Liatris ligulistylis   Mountain Mint (Pycnanthemum virginianum)   
New England Aster (Aster novae-angliae   Obedient Plant (Physostegia virginiana)   
Pale Purple Coneflower (Echinacea pallida   Prairie Blazing Star (Liatris pycnostachya)   
Prairie Coreopsis (Coreopsis palmata)   Prairie Milkweed (Asclepias sullivantii)   
Prairie Smoke (Geum triflorum   Rattlesnake Master (Eryngium yuccifolium)   
Red Marsh Milkweed (Asclepias incarnata)   Rough Blazing Star (Liatris aspera)   
Sky-blue Aster (Aster azureus    Spiderwort (Tradescantia ohiensis)   
Sweet Black-eyed Susan (Rudbeckia subtomentosa)    Tall Bellflower (Campanula americana)   
Thimbleweed (Anemone cylindrica)    Turtlehead (Chelone glabra)     
Western Sunflower (Helianthus occidentalis)    Wild Columbine (Aquilegia canadensis)    
Wild Geranium (Geranium maculatum    Wild Petunia (Ruellia humilis)   
Wood Mint (Blephilia hirsuta)    Yellow Coneflower (Ratibida pinnata)   


Cream Wild Indigo (Baptisia leucophaea)   Leadplant (Amorpha canescens)  
New Jersey Tea (Ceanothus americanus)   Purple Prairie Clover (Petalostemum purpureum  
White Prairie Clover (Petalostemum candida)   White Wild Indigo (Baptisia leucantha)    
Wild Lupine (Lupinus perennis)      


Copper Shouldered Oval Sedge (Carex bicknellii)   Little Bluestem (Andropogon scoparium)  
Torrey's Rush (Juncus torreyi)   Prairie Dropseed (Sporobolus heterolepis)  
Side-oats Grama (Bouteloua curtipendula)   Virginia Wild Rye (Elymus virginicus  

Environmental Learning Center Hours: 8-4:30pm
Retzer Nature Center Ground Hours: Sunrise to 10pm (Year-Round)
There is no Daily Entrance Fee at Retzer Nature Center
Park System Office
515 W. Moreland Blvd. Rm AC 230 Waukesha, WI 53188
Business Hours: M-F, 8-4:30 pm (excluding Holidays)
Phone: (262) 548-7801 | Fax: (262) 896-8071
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