Recently we held a seminar here at BGC on effective weed control. Walt Uebele, owner of the Burlington Garden Center, walked through different methods, products, and their time of use on the lawn, perennials beds, and vegetable gardens. Here are some of the highlights:

For crabgrass in the lawn, preventative measures can be taken in the early spring. Products such as Hi-Yield's Crabgrass Control effectively prevent weed seeds from germinating. If you miss spring's pre-emergent window,  Walt recommends Fertilome's Weed-out with Crabgrass Killer in mid-May. This will control crabgrass as well as a long list of broadleaf weeds including dandelions, thistles, chickweed, and ground ivy. Liquid products applied with a hose-end sprayer (RTS - Ready-to-Spray) are easy to use, require no mixing, and result in good coverage. They also eliminate the need to time the applications with dew or rain. 

For dandelions, Walt recommends Hi-Yield 2,4-D.  This concentrate should be mixed with Spreader Sticker which is a surfactant that improves absorption into the leaf of the weed. Dandelions are a sign of compact soil, so core-aerating in the fall will help improve soil structure. 

Other lawn tips: Proper fertilization can help reduce the number of weeds in a lawn. Use Milorganite as a lawn fertilizer in the spring (May) and again in the fall for a slow, even green-up, with no burning. For those who want to use an organic fertilizer on the lawn, corn gluten is the best option. 

To eliminate grass in asparagus beds, use Fertilome's Over the Top Grass Killer. It is absorbed by the grass foliage and travels through the entire plant working systemically. Over-the-Top will kill grass in perennial beds as well  - see label for complete list.

Walt has a warning when using products like Round-up and Hi-Yield's KillzAll - avoid purchasing the Extended Control versions by mistake. Extended-control products will kill everything and prevent any growth for up to 3 months. The dual-action formulas (pre-emergent and post-emergent) are designed to be used on driveways and sidewalks. 

Creeping Charlie can be a real nuisance in the lawn as well as in landscaped areas. Fertilome's Weed-free Zone works in well in the cool temperatures of spring and fall on creeping Charlie as well as 80 other problem weeds. If creeping Charlie has crept into your perennial beds, Weed-free Zone can be used taking care to avoid contact with the leaves of perennial plants. 

For those of you who use Preen, Walt suggests switching to products containing Dimension. This newer technology will suppress the germination of annual grasses and broadleaf weeds, can be used earlier in the spring (April), and has a longer window of control extending well into the growing season. Dimension can be used in perennial beds, ornamental landscape areas, and established lawns.  

Natural weed control in perennial beds and the vegetable garden can be achieved with a thick layer of mulch. Speaking of natural, a new line of natural products here at BGC is Natria by Bayer Advanced. In addition to natural insect and disease control products, there is a Grass & Weed Killer that uses naturally-derived, non-synthetic active ingredients to kill listed grasses and weeds. 

We hope this gives you a good overview of how to effectively manage weeds in your yard this year. Feel free to ask Walt or our knowledgeable staff questions you have may have about your specific situation. 

- Tracy Hankwitz
BGC Store Manager
Horticulturist & Landscape Designer



photo source: gertens.com

"A garden is only as good as its soil." 

A wise gardener once said this. While soil is not the most exciting part of gardening, it could be the most important. 

There are many things to consider about soil and it's rare to find the perfect soil without adding amendments of some kind. Here in SE Wisconsin, much of our soil structure is heavy clay - water tends to sit longer and plants struggle without air in the soil.  Along the lake it tends to be more sandy which offers better drainage, but nutrients tend to seep away along with the water. The ideal soil is loamy rich in organic matter and beneficial microbes. If you have heavy clay or sandy soil, adding compost every fall or spring is the best thing you can do. 

In addition to good soil structure, soil pH is a key factor. If your plants aren't flourishing, it could be the wrong soil pH. Proper pH promotes plant growth by making it easier for roots to absorb essential nutrients. 7.0 is neutral; above that is considered alkaline (our native soil's tendancy); below that is acidic. Most garden plants grow best in slightly acidic soils (6.5). ​Adding peat moss will lower the pH as will other organic amendments as they decompose. Blueberries, for example, need a soil pH of 4.5-5.5, so planting in peat followed with an annual boost of aluminum sulfate will help. A simple soil pH test can be helpful in knowing what you need to add to sweeten or sour the soil. 

Speaking of soil tests, it's a good idea to test your soil in the spring to see what is lacking. Whether you are growing vegetables, shrubs, perennials, or turf, it's worth it! There are simple DIY tests available here at BGC that will give you a general idea. If you want more specific results, take a soil sample and send it in to UW Madison Department of Soil Science.  We have the test kits here as well. 

If you only take two things away from this article, here is one of them: Feed the soil, not the plants! Just as we don't live on water alone, plants need food as well. The best thing you can do for your plants is to feed the soil. By building up the soil with minerals, nutrients, and microorganisms, you are also feeding the plants. We hear alot about NPK (nitrogen, phosphorus, and potassium) but minerals are just as important. Minerals make up 90% of garden soil and hold onto plant nutrients. 

The second is the soil is alive! It's alive with microorganisms (bacteria and fungi) that capture moisture and nutrients making them available to the plant roots. Our favorite things to feed the soil are worm castings because they add NPK, calcium, minerals, and beneficial bacteria. TIP: Add directly to the planting hole or row rather than to the entire garden bed. Composts, especially cotton burr compost, is another favorite amendment. Not only do they add organic matter and microorganisms, they lighten the soil. This means clay soils won't be so heavy and sandy soils will have better nutrient capacity. A personal favorite of mine is Nature's Blend with alfalfa and humates. I add it to every planting hole for trees, shrubs and perennials. It also makes a good top dressing for lawns. 

The benefits of compost tea have long been touted, but not everyone wants to mess with putting compost in a cheesecloth bag and letting it steep overnight in a 5-gallon bucket of water. Life just got easier with prebagged compost tea bags from Purple Cow. Drop one in your watering can and after steeping, water the soil around the plants or use it as a foliar feed. 

One last recommendation for improving soil is to sow a cover crop in the fall to till under in the spring. Winter rye and buckwheat are two that work well in our area. The tilled-under foliage becomes an instant source of nitrogen which the microbes will quickly breakdown making it available to the plants.

As you make your garden plans for spring, include plans to improve your soil. Your plants will thank you!

Tracy Hankwitz
BGC Store Manager & Horticulturist 
 
photo source: redbeacon.com