Winter Damage Concerns for Trees

Protecting Young Trees from Animal and Other Damage Over Winter

▶ WATCH: Maintaining Your Festive Houseplants

Choosing the Right Christmas Tree (PDF)

It’s winter – from now through spring, if you are a gardener, expect garden seed catalogs. If you plan to place an order or two, here are a few tips and ideas that you might find helpful. First, do an inventory of what seeds you already have. Many seed packets have more seeds than we use in one season. If stored properly, many are fine to use the next season or beyond (see How to Store Leftover Garden Seed). Then compare the list of seeds that you have with the list of seeds you plan to order. Be mindful of the available space you have to plant. I plant both a patio container garden and a garden plot at a local community garden. One of my favorite winter activities is making sketches of possible garden layouts. This helps me figure out how much space I actually have to plant. It’s not unheard of to have great expectations and order many wonderful selections only to run out of room to plant them. If you keep a garden journal, review how last year’s season went and give some thought to whether it makes sense to expand or reduce your efforts. Are there plant varieties that worked really well and deserve another spot in the garden or some that need not apply for the 2025 season. If you don’t keep a garden journal, think about starting one. It’s a great way to keep your garden life organized (gardener’s confession: this is advice I often give but am not so great at following but I do start a journal every year…). There are many ways to keep a journal from good old paper and pencil to computer spreadsheets or Smart device apps. When making an order, pick a packet of something new. Trying something new, whether a vegetable, flower or herb can be exciting as well as help widen your garden repertoire, if the new item is a success (I do this with recipes too. Every month, I try a new recipe and if it works, I add it to the list of meals I like to make). Lastly, if you garden with children, let them make some selections, particularly with vegetables. If they plant vegetables, help them grow and harvest them, kids are more likely to try them at the dinner table. For gardening questions, please feel free to contact me at margaret.murphy@wisc.edu or at 715-726-7957.Remember, it’s never too early to think about gardening!

Winter Salt Injury and Salt – tolerant Landscape Plants

Analysis of Dormant Shade Trees

Margaret Murphy

I came across this amusing question while looking through a Junior Master Gardener manual. Did you guess the answer? Soil. Sunflowers grow in soil, where they receive nutrients, water and support. Cows feed on plants that grow in soil and jeans are made from fibers that got their start in soil. We probably don’t spend much time thinking about the fact that many of the items we use every day or foods that we eat wouldn’t exist without soil but as gardeners we do need to pay attention to the health of our soil.

Soil is an intricate composite of minerals, organic materials, water and air. Healthy soil is teeming with life, much of which is microorganisms that include bacteria and fungi. Microorganisms are essential to decomposing organic remains and recycling soil nutrients. One key to healthy soils is organic matter. Almost all garden soils benefit from the addition of organic matter. It can improve soil texture and help build and stabilize soil structure. In turn, this improves root growth and increases the moisture absorption, aeration and nutrient-holding ability of the soil. Organic matter also helps to feed those microorganisms that work so hard in the garden.

As crops grow, the amount of organic matter will lessen unless organic materials are added back in. Types of organic matter include organic mulches such as grass-clippings (not treated), straw, and newspaper as well as shredded tree leaves, green manure (cover crops), animal manure (well-aged), and compost.

Adding organic matter improves soil fertility; however, animal manures and plant material may not provide a complete diet for plants. Soil may also require additional fertilizer. If you are unsure about the fertility of your garden soil, consider getting a soil test done. In addition to telling you the level of organic matter in your soil, a soil test will determine whether or not there is a need to apply additional amendments.

A soil test will also tell you the soil pH. Knowing your soil pH is important because it affects the way a plant is able to take up nutrients. Some plants have a strong preference to the pH they grow in. Blueberries, for example, need a more acidic environment with a soil pH level between 4.5 to 5.5. Knowing the pH of your soil helps you choose the right plant for the right place.

Spring is a great time to get a soil test done. That gives you time to incorporate any soil enrichment needs before planting. It is recommended that you have a soil test done about every three to five years. You can contact your local county Extension office for more information.

And remember to tend your soil like you do your plants. See you in the garden.

Margaret Murphy

When planning my garden, together with vegetables and flowers, I always include herbs. The aroma of fresh herbs just seems to brighten the spirit. Some of my favorite herbs to grow are often referred to as culinary herbs because they are commonly used in the kitchen for cooking.

Of course, sweet basil is one. The term basil is believed to come from the Greek word basilikon, meaning ‘royal’ or ‘king’; hence, the herb’s distinction of being called the ‘king of herbs’. Given its lovely fragrance and surplus of uses, I’d say it is aptly named.

Basil is easy to grow. Most often it is direct seeded into the garden. Make sure to sow after the danger of frost has past as it is cold sensitive. Plant in a sunny area. After the seedlings develop their “true leaves”, thin plants to about to four to six inches apart. You can harvest basil leaves throughout the growing season. Frequent trimming will encourage new growth and keep the plant bushy. There are many varieties available to plant. Some fun choices I have grown are cinnamon, lemon, lime and Thai basil.

Basil also grows well in a container, which is how I grow most of my herbs. Keep in mind though that, as with all annuals, the plant will eventually flower and die so keep a packet of seeds handy for sowing another crop.

Basil can be added to so many dishes the list seems unending. There are recipes for stews, soups, meat dishes, fish dishes, egg dishes, vegetable dishes, sauces, and even fresh fruit desserts.

Another herb on my culinary list is common sage. A native to the Mediterranean region, garden sage is a perennial though in our climate it is usually grown as an annual. Sage grows easily from seed; however, transplants are preferred to get a harvestable plant quicker. Plant after the last frost or if starting by seed, start indoors six to eight weeks before the average last frost date. Leaves can be harvested as needed through the season. Young leaves can be eaten fresh in salads but sage is often used to flavor savory dishes containing poultry, stuffing and hearty vegetables.

And then there is parsley, an often-underutilized herb too long associated with being just a garnish on a dinner plate. But parsley is rich in flavor and considered a natural breath freshener. Parsley is a biennial but in our region is treated as an annual. The two most common culinary varieties are the Italian flat-leaf and curly-leaf. Each is easy to grow by direct seeding into the garden or a pot. Plant in the spring just before the last predicted frost; however, be patient as parsley is slow to germinate. There’s an old saying that says parsley goes to the devil seven times before it grows. If planted in the garden, a helpful aid to keeping track of rows of newly seeded parsley is to plant radish seeds in with the parsley seeds. The radish will germinate quickly to mark the row where parsley is also planted.

You can harvest the leaves as they mature. Snip stalk close to the ground to encourage continued growth. There is a superstition that it’s bad luck to move parsley from garden to garden. It stems from the fact that parsley is hard to transplant once established so it should be sowed where it is to grow. Fresh parsley works with most foods and can be added to salads, sauces, soups and, yes, used as a garnish for an after-dinner treat.

Keep in mind that parsley is a host plant for the black swallowtail butterfly and a favorite of rabbits, so don’t be surprised if it disappears from your garden faster than expected.

Lastly, I want to mention rosemary, another favorite herb. Like most herbs, this Mediterranean native has a rich history in folklore. In the Middle Ages rosemary was used to protect against evil spirits. If placed beneath your pillow, it was said to ward off bad dreams. Today, rosemary symbolizes love and remembrance. Traditionally, sprigs are scattered on the grave of beloved family members to show that they will not be forgotten. Rosemary also has a reputation for improving memory. So, if you are having trouble remembering where the car keys are, grab a sprig of rosemary and give it a sniff.

Wild rosemary can be found growing along the coast of Italy, Greece, Spain and France. Its fondness for the seaside played a role in the herb’s name, which comes from the Latin words ros (dew) and marinus (sea) or “Dew of the Sea”.

A perennial evergreen in warmer regions, here in the Midwest we treat rosemary as a tender perennial. While it can be grown from seed, like sage, transplants are preferred. Seeds germinate very slowly and germination rates are low. If you start a plant from seed sow the seeds indoors eight to twelve weeks before the last predicted spring frost.

Rosemary does not transplant well so northern gardeners often grow it in a pot and take it indoors for the winter. Make sure to put it in well-drained soil and be careful not to overwater. To keep this fragrant herb happy indoors, place in a cool, sunny location where the relative humidity is high.

Depending on the variety, rosemary can be an upright shrub or a creeping plant. Both are used for cooking. Rosemary has a distinctive sharp flavor and pairs well with many different foods including roasted meats, cheese, bread and poultry. I enjoy it with potato dishes and other vegetables like carrots and onions. Harvest leaves just before use. Keep in mind that the flavor of rosemary often gains strength the longer a dish cooks.

Remember, it is never too late to make room for an herb garden!

Margaret Murphy

Here are a few flowers that tolerate cooler temperatures and light frosts. They can be transplanted in early spring (whenever that may be in Wisconsin).

Pansies (Viola x wittrockiana) always seem to be described as flowers that will make you smile. I guess it’s because they come in so many festive colors. Not a fan of summer heat, pansies prefer cooler temperatures. They can tolerate frost and have been known to readily survive a late-season snowstorm. Pansies prefer moist, well-drained soils. Plant in a sunny or partially shaded location. The flowers are edible, and their petals are often used to color butter or to decorate cakes and pies.

One of my favorite flowers of all time are snapdragons (Antirrhinum majus). Sun-lovers, they come in a wide array of colors and sizes. Varieties range from only six inches high to almost three feet tall. Grown as an annual in Wisconsin, they are considered easy to grow and offer a long bloom time (though they may wane during the hot summer months). A great flower to plant for children as they love opening the “jaw of the dragon” and letting it snap shut. Snapdragons make a nice addition to a cutting garden as they look great in bouquets.

Alyssum (Lobularia maritima) is reported to tolerate temperatures down to 28ºF. Commonly found sporting white flowers, varieties of pink, lavender and blue can also be found. Alyssums are low-growing plants that work well in garden borders though some cultivars have a trailing habit that would work in a hanging basket. They prefer a sunny or partially shaded spot.

For an annual with interesting foliage, consider planting the Bells-of Ireland (Molucella laevis). The stems are thickly covered with bell-shaped structures called calyxes. Within the calyxes bloom petite, white flowers resembling the clappers of a bell. They can be planted outdoors once nighttime temperatures are above 40ºF. They favor moist soils, and full sun though will manage fine in part shade. Keep in mind they often self-seed in the garden if flower stalks are left on the plants until dried. Blooming stems make an excellent addition to dried or fresh cut flower arrangements.

One of the first native plants to bloom in early spring in the upper Midwest is Symplocarpus foetidus, commonly called skunk cabbage. Skunk cabbage is one of just a few plants that exhibit thermogenesis, or the ability to metabolically generate heat allowing it to bloom while there is still snow and ice on the ground. So, the next time you are out for a walk in the woods, keep an eye out for this amazing plant. For more information and to see photos, check out the article, Skunk cabbage, Symplocarpus foetidus.