A thorough fall cleanup means a healthy, vibrant spring, so check out these tips for preparing your landscape for frost and other winter weather! Click on the names of the plants throughout the page to find out more about how to harvest or care for the plants in the fall (adopted from The Old Farmer’s Almanac).
1. Preparing your vegetable garden for the winter
You can postpone the inevitable (that is, winter) for a while by covering your vegetables with old sheets or bedspreads on cold nights, but the declining light and chilly daytime temperatures will naturally bring plant growth to a halt. Get more tips for protecting your garden from frost, and see the estimated frost dates here based on information pulled from Michigan State University’s W.K. Kellogg Biological Station on Gull Lake.
Leave carrots, garlic, horseradish, leeks, parsnips, radishes, and turnips in the garden for harvesting through early winter. Mark the rows with tall stakes so that you can find them in snow and cover them with a heavy layer of mulch to keep the ground from thawing.
- Pull up tomato, squash, pea, and bean plants. If they’re disease-free, compost them. If any are diseased, either burn them or discard separately. Pull up and put away the stakes.
- Before the ground gets too hard, remove all weeds and debris and eliminate overwintering sites for insects and disease. Check our Pest Library for tips on preventing the most common pests in your garden.
- Gently till the soil to expose any insects who plan to overwinter; this will reduce pest troubles in the spring and your garden site will be ready come spring!
- Once most of the garden soil is exposed, add a layer of compost, leaves, manure (if you have it) and lime (if you need it). Gently till into the soil.
- Another option is to sow cover crops such as winter rye to improve your soil and reduce weeks. See an article on Cover Crops for the U.S.
- If some areas have hopelessly gone to weeds, cover them with black plastic and leave it in place over the winter and into the spring to kill sprouting seeds.
2. Preparing herbs for the winter
- Sage is a perennial in most areas and does not need special treatment for the winter. Before frost stops its growth, cut a branch or two to dry and use in stuffing at Thanksgiving!
- Rosemary is a tender evergreen perennial that should be sheltered outside (USDA Plant Hardiness Zone 6) or potted up and brought inside (USDA Zone 5 and colder) for the winter.
- Thyme is fairly indestructible. A perennial, it will go dormant in the fall, then revive by itself in the spring.
- Parsley, a biennial, will withstand a light frost. In Zone 5 or colder, cover it on cold nights. It has a long taproot and does not transplant well.
- Chives are hardy perennials. Dig up a clump and pot it, then let the foliage die down and freeze for several weeks. Bring the pot indoors to a sunny, cool spot. Water well and harvest chives throughout the winter.
3. Preparing berry patches for the winter
- In early to mid-fall, prune summer-bearing raspberries, leaving six of the strongest brown canes for every 1 foot of your row.
- Prune fall-bearing raspberries ruthlessly, moving them to the ground after they have borne fruit. New canes will come up in the spring.
- Plant blackberries in the fall and mound up the soil around the canes to prevent hard frosts from heaving them out of the ground.
- Cover strawberry beds with straw or hay.
4. Preparing perennials and flowers for the winter
- Water your perennials and flowering shrubs in the fall; they will thank you for it this winter.
- Once the ground has frozen hard, cut perennials back to 3 inches and mulch them with a thick layer of leaves or straw.
- If you plan to put in a new flower bed next spring, cover that area now with mulch or heavy plastic to discourage emergent growth when the ground warms up in the spring.
- Before a heavy snowfall, cover pachysandra with a mulch of pine needles several inches deep.
- Move potted chrysanthemums to a sheltered spot when their flowers fade. Water well and cover with a thick layer of straw to overwinter them.
- When a frost blackens the leaves of dahlias, gladioli, and cannas, carefully dig them up and let them dry indoors on newspaper for a few days. Then pack in Styrofoam peanuts, dry peat moss, or shredded newspaper and store in a dark, humid spot at 40° to 50°F until spring.
5. How to overwinter geraniums
- Geraniums (pelargoniums) are South African in origin, and there they have a three-month dormant period during winter’s excessive dryness. They need to be kept well watered before going into dormancy.
- In the old days, we had cool cellars with dirt floors that were dark and moist. Our mothers shook the dirt off geranium roots and hung them upside down in bundles. In spring, they were cut back and potted up, and performed nicely.
- If you have a cool place in your house (around 50 degrees Fahrenheit), it is possible to overwinter your geraniums by keeping them in their pots and giving them very little water.
- In spring, bring them into a warm place and water them heavily. When they start to show buds, repot them and prune heavily.
- They will do best in plastic or glazed pots with very good drainage (you can overwinter geraniums as houseplants without letting them go dormant, but they will be deprived of the rest they like).
6. Winterizing roses
- You may water roses regularly through the fall; stop fertilizing about 6 weeks before the first frost.
- Remove any dead or diseased cane.
- After the first frost, mulch plants with compost or leaves to just above the swollen point where the stem joins the rootstock.
- In areas where winter temperatures are severe (ahem, Michigan), enclose low-growing roses with a sturdy cylinder of chicken wire or mesh and fill enclosure with chopped leaves, compost, mulch, dry wood chips, or pine needles.
- Before daily temperatures drop well below freezing, carefully pull down the long canes of climbing and tea roses, lay them flat on the ground and cover them with pine branches or mulch.
7. Preparing trees for winter
- Protect small trees or shrubs from extreme cold by surrounding it with a cylinder of snow fencing and packing straw or shredded leaves inside the cylinder.
- Inspect your trees. Remove any broken limbs, making a clean cut close to the trunk.
- If you’re planning to buy a live Christmas tree this season and want to plant it after the holiday, dig the hole where you want it before the ground freezes. Store the soil you remove in the garage or basement, where it won’t freeze. Place a board over the hole and mark the location so that you can find it if it snows.
8. Tips for fall cleanup in your garden and landscape
- Empty all your outdoor containers to keep them from cracking during the winter. Store them upside down.
- Hang a bucket over a hook in your toolshed or garage and use it to store hose nozzles and sprinkler attachments.
- On a mild day, run your garden hose up over a railing or over the shed to remove all the water. Then roll it up and put it away.
- Mow your lawn as late into the fall as the grass grows. Grass left too long when deep snow arrives can develop brown patches in the spring.
- Don’t leave fallen leaves on the lawn. Rake onto a large sheet or tarp, then drag to your compost pile in thin layers mixed with old hay and other material. Or, rake the leaves into loose piles and run the mower over them to turn them into mulch for perennial and bulb beds. Get more tips on what to do with fall leaves.
- Cover your compost pile with plastic or a thick layer of straw before snow falls.
- Drain the fuel tank on your lawn mower or any other power equipment. Consult the owner’s manual for other winter maintenance.
- Scrub down and put away your tools. Some folks oil their tools with vegetable oil to avoid rust. Find out how to care for your gardening tools.
Don’t have time (or energy) to make all of this happen? Give us a call, we’ll help lighten the load.
This article was adopted from The Old Farmer’s Almanac.