8 Garden Projects Worth Doing in the Fall

Fall Is the Gardener's Second Season

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Most people think of gardening as a spring and summer activity, but fall may be the best time to do the work that pays off for years. Soil is still warm, rain is more reliable and cooler air makes it easier to dig, haul and build. Plants establish roots over winter, and projects done now will be ready when spring arrives, saving time when everything else competes for attention. Extension services and experienced gardeners agree on the basics: protect bare soil, add organic matter, plant what thrives in cool weather and build the infrastructure for next season. The eight projects below range from quick afternoon jobs to weekend builds, and most cost little beyond materials you already have, like leaves and cardboard. Timing depends on your region and first frost date, so check your local extension for guidance. Do these now and spring becomes a lot easier.

Plant Garlic

Garlic is planted in fall, usually late October or early November in many regions, so that it develops roots before winter and sprouts in spring. Amend the bed with plenty of compost, because garlic is a heavy feeder, and choose a sunny spot with well-drained soil. Plant individual cloves pointed end up about two inches deep and four to six inches apart. Extension guides suggest mulching after shoots emerge, since thick mulch can slow spring growth and reduce bulb size, though research comparing mulched and unmulched garlic is limited. Order seed garlic early, because supplies from many growers run low. Hardneck varieties do well in cold climates and produce scapes, while softnecks store longer and suit milder winters. Harvest in midsummer when the lower leaves brown. Planting garlic now is one of the highest-return fall garden jobs.

Sow a Cover Crop

Bare soil over winter is vulnerable to erosion and nutrient loss, and cover crops are a simple fix. Plants like winter rye suppress weeds and add organic matter when worked into the soil in spring, while Austrian winter peas and crimson clover add nitrogen, and daikon radish helps loosen compacted soil. Sow them in early fall, a few weeks before your first hard frost, so they have time to establish. Broadcast the seed on cleared beds, rake it in and water lightly. In spring, cut the crop down before it sets seed and turn it under or let it break down on the surface. If it's too late in your area to sow a cover crop, cover bare soil with a thick layer of shredded leaves instead. Either way, you're feeding the soil biology and protecting it through winter, which makes next season's beds much healthier.

Build a Lasagna Bed

A lasagna bed, also known as sheet mulching, builds a new planting area without digging or removing sod. Lay down overlapping sheets of plain cardboard or newspaper directly on grass or weeds, wet it thoroughly, then layer on compost, leaves, straw, grass clippings and other organic matter. Aim for a pile at least a foot deep, since it will settle. Over the winter, the layers break down and smother the grass underneath, leaving rich soil by spring. Fall is a perfect time because leaves are plentiful and the bed has months to decompose. The method takes some time to set up but requires far less labor than digging. By spring, you can plant right into the bed, adding extra compost for seedlings. Avoid glossy printed paper, treated wood and diseased plants, and keep the layers moist as they break down.

Build a Hügelkultur Bed

Hügelkultur is a mound-style raised bed built over a base of logs, branches and woody debris, covered with layers of leaves, compost and soil. As the wood decomposes, it releases nutrients slowly and holds moisture like a sponge, which reduces watering needs in the following seasons. One gardener says a large bed can supply nutrients for up to twenty years, though the mound settles as the wood breaks down. Fall is a good time to build one, since fallen branches and leaves are easy to find, and a cover crop can be planted on top for winter. Avoid wood from black walnut, which produces growth-inhibiting compounds, and treated lumber. Use rotting logs if you have them, and stack the material in a mound three to five feet high. Plan to plant crops like squash or potatoes in the first year while the bed settles.

Plant Trees, Shrubs and Berries

Fall is an excellent time to plant fruit and nut trees, berry bushes and ornamental shrubs. The air is cooler, so plants face less stress, and soil is still warm enough for roots to grow before the ground freezes. Winter rain or snow keeps the soil moist, and the plants establish before spring growth demands water. Dig a hole about twice as wide as the root ball and no deeper, spread out roots, backfill and water thoroughly. Add a 2- to 3-inch layer of mulch, keeping it away from the trunk to prevent rot. Stake taller trees only if needed. Avoid heavy pruning or fertilizing at planting, which can prompt tender growth that frost will kill. Plant at least six weeks before the ground freezes in your area. Many nurseries discount stock in fall, so it's also a good time to save money.

Plant Spring-Blooming Bulbs

Tulips, daffodils, crocuses and other spring bulbs must be planted in fall, because they need a long period of cold to bloom. A general rule is to plant when soil temperatures drop below about 60 degrees, usually in September to November depending on your area. Choose a sunny location with well-drained soil, and plant bulbs about two to three times as deep as they are tall, pointed end up. Group them in clusters for impact rather than lining them up like soldiers. Daffodils and alliums are less appealing to deer and rodents than tulips, which are often eaten. Water after planting to start root growth, then let nature handle the rest. Mark the spots so you don't dig them up in spring. Layering bulbs of different bloom times in the same bed extends the display from early spring through early summer.

Make Leaf Mold and Compost

Fallen leaves are free organic matter, and fall is the time to put them to work. Shred them with a mower and pile them in a corner, bin or wire cage, and keep them damp. Over a year or two, they break down into leaf mold, a crumbly material that improves soil structure and holds moisture, especially useful for potting mixes and seedling beds. For faster results, mix shredded leaves with green material like grass clippings, kitchen scraps and garden trimmings to build a hot compost pile. Fall is also a good time to start a new pile if you have lots of plant debris from clearing beds. Avoid diseased plants and weeds with seeds, and don't compost black walnut leaves. Turn the pile occasionally and keep it as moist as a wrung-out sponge. By spring, you'll have a rich amendment ready for your beds.

Build a Cold Frame or Row Cover

A cold frame is a simple box with a clear lid that traps heat, extending the growing season for greens, herbs and root crops well into winter. It can be built from salvaged windows, wood and a few hinges, then placed over a bed with good sun exposure. Row covers made of lightweight fabric over hoops provide similar protection with less work and can add several degrees of frost protection. Hardy crops like spinach, kale, lettuce, carrots and scallions often keep growing under cover into winter. Ventilate on sunny days to prevent overheating, and close the lid at night. In many climates you can harvest fresh greens for months, saving money and extending the season. Build or install your cover now, while the weather is mild, and sow seeds in early fall for the best results. In spring, the same structure helps start seedlings early.

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