🗓️ Seasonal Tips

Bulbs need a cold dormancy period to bloom. Plant when soil temperatures drop to about 40–50°F (usually when nights are consistently below 40°F). Planting too early in warm soil can cause premature growth that gets killed by hard frost.

The rule of thumb: plant at 3× the bulb's height. Tulips go 6–8 inches deep, daffodils 6 inches, crocus 3–4 inches, alliums 4–6 inches. Deeper planting means more winter protection and longer-lived bulbs.

All bulbs should be planted with the pointed tip facing upward. If you can't tell which end is up on small bulbs (like crocus), plant them on their side — they'll find their way.

Bulbs rot in waterlogged soil. If your soil is heavy clay, add a 2-inch layer of coarse grit or sharp sand to the bottom of the planting hole. Raised beds are ideal.

Try the "lasagna" method: plant large bulbs (tulips, alliums) deep, then layer smaller bulbs (crocus, grape hyacinth) above them in the same hole. They bloom at different times, extending the season. Cover the whole hole with soil.

Use small stakes or bamboo skewers to mark bulb locations so you don't accidentally dig through them in spring. Label with the variety name so you remember what to expect.

Your "average first frost date" is a statistical 50% probability — there's a 50/50 chance of frost before that date. Monitor your local 10-day forecast from late September and be ready to cover crops at 36°F (just above frost).

Bend ½-inch PVC pipes into hoops over your bed, spaced 2 feet apart, and drape floating row cover fabric over them. Set this up before temperatures drop so you're ready to deploy instantly when a frost warning comes.

Lightweight floating row cover (1.5 oz/sq yd) adds about 4°F of frost protection. Medium weight (2 oz) adds 6°F. A proper covered cold frame with double-wall polycarbonate can provide 10–15°F of protection, turning zone 6 into zone 7 effectively.

On freezing nights, frost-hardy crops like kale and spinach actually accumulate sugars to act as antifreeze — this makes them sweeter. Harvest in the morning before uncovering, when they're at their most flavourful.

Even late into fall, a sunny day inside a covered tunnel can reach 90°F+, wilting and even burning plants. Open ends or lift covers on any day above 50°F to prevent overheating.

Any plant showing signs of blight, mildew, rust, or fungal disease must leave the property — never compost it. Disease spores overwinter on debris and reinfect next year's plants. Bag it for trash or burn where allowed.

Tomato, pepper, squash, and bean plants are done for the season. Pull them root and all to deprive overwintering pests (squash vine borer, tomato hornworm pupae) of habitat. Compost if healthy.

Echinacea, rudbeckia, sunflowers, and ornamental grasses with seedheads are a critical winter food source for goldfinches, sparrows, and other birds. Leave them until late February/March when natural food becomes available again.

A thin layer of shredded leaves is excellent free mulch and earthworm feed. Run your mower over fallen leaves until they're dime-sized pieces, then leave them on the lawn or rake onto beds. A thick mat of whole leaves can smother grass — only shredded leaves are beneficial.

Hollow-stemmed perennials (echinacea, rudbeckia, bee balm) provide overwintering habitat for native bees. Leave them standing until spring. Hostas, daylilies, and ornamental grasses can be cut back to prevent slug habitat in spring.

Fall is the perfect time to redefine bed edges with a half-moon edger. Crisp edges make spring cleanup easier and give beds a defined, attractive shape all winter.

Never give lilacs, forsythia, or azaleas a "fall haircut." Their flower buds formed over summer on old wood — pruning in September or fall cuts off next May's flowers. Save shaping cuts for right after spring blooms fade.

Unlike spring-flowering shrubs that must be left untouched, Photinia × fraseri should be shaped in early September. If you wait until spring to tidy your red-tip hedge, you cut off the brilliant red flush that emerges at branch tips. One clean early-fall shaping cut sets the framework for an untouched, blazing scarlet spring display.

Sweet potatoes are tropical perennials that cannot tolerate frost. Once freezing temperatures blacken and kill the vines, decay organisms travel down dying stems into the storage roots within days. Dig tubers carefully the same day frost strikes to save your crop from rot.

In interior California valleys (Davis, Sacramento, San Joaquin), second-crop seed potatoes must be in the ground during the first two weeks of September. Waiting past mid-September means vines won't develop enough canopy before cold weather and winter frost halt tuber formation.

As soon as you remove a crop, spread 2–3 inches of finished compost over the bed. This feeds soil microbes and earthworms over winter, so by spring you have biologically active, crumb-structured soil ready to plant.

Fall is the ideal time to apply lime (to raise pH) or sulfur (to lower pH) because these amendments take 2–3 months to fully affect soil chemistry. Apply in fall and till lightly — by spring, your pH will be where you want it.

Cover crop seeds germinate best in soil above 50°F — usually through early October in most zones. Broadcast seed over bare beds, rake lightly to cover, and water in. They establish over fall and resume growth in early spring.

While cold-hardy winter rye can be sown late into November, Daikon radish requires 6–8 weeks of warm early-autumn weather to grow its massive, soil-busting taproot. Sowing in September or early October allows the taproot to drill 12–18+ inches into heavy subsoil and scavenge nitrogen. Waiting until November leaves you with tiny pencil-sized roots that fail to break compaction.

Mow or till cover crops under 2–3 weeks before you want to plant in spring. This gives them time to decompose. For no-till gardens, crimp or mow to kill and leave as mulch — transplant directly through the dead mat.

If you're not planting a cover crop, layer leaves, straw, or wood chips 3–4 inches thick over cleared beds. This prevents erosion, reduces compaction from winter rain, and insulates soil from freeze-thaw damage.

September is the ideal window to plant asters, coneflowers, sedums, bare-root peonies, and violas. Warm soil (above 55°F) fuels rapid root branching before ground freezes, while cool nights reduce transpiration shock so plants emerge in spring twice as vigorous as spring-planted nursery stock.

Hostas, daylilies, irises, coneflowers, ornamental grasses, and sedums all benefit from division every 3–4 years. Dig up the clump, slice through the root mass with a sharp spade, and replant divisions at the same depth. They'll establish roots before freeze.

A tree planted in fall has 6–8 months of root development before it has to support a full canopy of leaves. Fall-planted trees experience significantly less transplant stress than spring-planted ones. Water well until the ground freezes.

Dahlias, cannas, calla lilies, elephant ears, and gladiolus cannot survive winters in zones 5 and colder. After frost kills the foliage, dig up tubers, let them dry 1 week, and store in paper bags with peat moss in a cool (40–50°F), dry location.

After the ground has frozen (not before — you don't want to trap warm ground and delay dormancy), apply 3–4 inches of straw or shredded leaves over new plantings. This prevents freeze-thaw heaving that lifts shallow roots out of the ground.

Garlic is planted in fall (2–4 weeks before ground freezes) and harvested next July. Break bulbs into individual cloves, plant 2 inches deep and 6 inches apart, pointed end up. Mulch heavily with straw. It's one of the most rewarding things you can grow.

Retail nurseries stock their premier native inventory (Ceanothus, Manzanita, sages, buckwheats) in September. Snap up your plants while stock is strong, but resist planting during lingering summer heatwaves. Potted natives planted into baking 85°F+ soil stall root expansion and rot when watered. Stage pots in dappled shade and wait to plant until daytime highs moderate in mid-to-late autumn.

Wash soil off pruners, loppers, and hoes with soapy water. Use a metal file or diamond sharpening stone to restore a clean bevel edge — sharp tools make cleaner cuts that heal faster and require far less effort. Wipe blades with an oily cloth to prevent rust.

Water left in garden hoses expands when freezing and cracks the rubber. Disconnect hoses from spigots, drain completely by hanging in a loop, and store coiled in a garage or shed. Leaving hoses attached to outdoor spigots can also freeze and burst the pipe inside the wall.

In-ground drip and sprinkler systems must be winterized before freeze. Use a compressor to blow compressed air through each zone until no water comes out. Many garden centres offer this service for $50–80 — worth every penny if you have a complex system.

Terracotta, ceramic, and concrete pots filled with moist soil will crack from freeze-thaw expansion. Empty and clean them, then store in a garage, shed, or basement. If pots are too large to move, tip them on their sides to prevent water collection.

Walk the garden now and look for loose fence panels, wobbly trellis posts, and cracked raised bed lumber. Fall repairs before snow cover are far easier than spring ones. Treat any bare wood with a penetrating oil or stain.

Run lawnmowers, tillers, and string trimmers until the fuel is depleted — stale fuel is the #1 cause of starting problems in spring. Clean blades, change oil, remove spark plugs and add a few drops of oil to the cylinder before storing.