GardenAdvice gardening calendar third week in October 2026

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The week beginning 19 October is a good time to finish spring-bulb planting, improve exposed soil and prepare pots, ponds and tender plants for colder weather. The soil can still be workable, but shorter days and heavier rain mean it is important to choose the right job for the conditions.

This week’s weather rule: conditions vary widely across the UK. Plant and cultivate only when soil is moist but not saturated, postpone spraying in rain or wind, and protect tender plants before the first damaging frost. Newly planted borders and containers may still need watering during a dry, breezy spell.

Priority jobs this week

• Plant most spring-flowering bulbs; keep tulips for November where possible.
• Plant up hardy winter pots and hanging baskets, checking drainage carefully.
• Spread finished compost or mulch, and start collecting leaves for leaf mould.
• Clear leaves from lawns and ponds before they form a wet layer.
• Bring tender container plants under cover and inspect them for pests.
• Record fruit-tree pest-trap results and clear diseased rose leaves.

Plants, bulbs and winter containers

Plan the bulb display before planting

Plant daffodils, crocuses, Iris reticulata, alliums and other suitable spring-flowering bulbs now. Rather than scattering everything evenly, use informal groups and choose early-, mid- and late-flowering varieties to create a succession of colour. The new GardenAdvice guide, Create a beautiful bulb border, explains how to plan a scheme through the seasons.

As a general guide, plant bulbs two to three times their own height in free-draining soil, with the growing point upwards. Improve drainage in heavy soil or use containers where bulbs would otherwise sit wet. Delay tulips until November, when cooler soil generally reduces the risk of tulip fire. Label groups now so they are not disturbed later.

Create autumn and winter containers

Use a mixture of hardy foliage and seasonal flowers such as violas, pansies, compact heucheras and trailing ivy. Add dwarf bulbs beneath the surface plants for spring colour. Make sure drainage holes are open, use fresh compost where the old mix has collapsed, and raise containers slightly so excess winter rain can escape. See GardenAdvice’s autumn and winter hanging-basket guide.

Plant hardy shrubs and perennials

Container-grown hardy plants can still be planted while the ground remains workable. Water the root ball before planting, tease out circling roots, plant at the same depth and water the surrounding soil thoroughly. Allow for the plant’s mature size rather than crowding the border. In cold or exposed gardens, delay borderline-hardy plants until spring.

Protect tender plants

Move pelargoniums and other tender container plants under cover before frost. Lift or protect dahlias and cannas according to local winter conditions and soil drainage. Remove dead material and check pots, roots and leaf undersides for pests before plants enter a greenhouse or conservatory.

Soil, compost and mulching

Use cardboard beneath an autumn mulch

On beds dominated by annual weeds and seedlings, plain brown corrugated cardboard can form a temporary light-excluding layer. Remove plastic tape, labels and staples, overlap the sheets so weeds cannot find gaps, wet the cardboard and cover it promptly with approximately 5–8cm of well-rotted compost or mulch. Keep the covering clear of shrub stems, tree trunks and perennial crowns.

This method is not a cure for persistent perennial weeds such as bindweed, couch grass or horsetail, which should be dealt with separately. Avoid placing a thick, airless layer over waterlogged or badly compacted ground. The cardboard should break down as soil organisms work through it.

Spread compost and prepare the heap

• Spread finished garden compost over established ornamental and vegetable beds, leaving worms and winter weather to incorporate it into the surface.
• Mix fresh green material with dry leaves, shredded stems or torn cardboard when rebuilding the compost heap. Chop coarse waste and keep the heap moist, not saturated.
• Collect sound fallen leaves separately for leaf mould. Shredding or mowing over them first speeds decomposition.
• Use spent mushroom compost cautiously around lime-hating plants such as rhododendrons, azaleas, camellias and blueberries because it can be alkaline.

Avoid routine heavy feeding now. High-nitrogen fertilisers can encourage soft growth before winter; choose plant-specific treatment and use a soil test where nutrient status is uncertain. Read GardenAdvice’s autumn fertilising guide.

Vegetable and fruit garden

• Plant autumn garlic and suitable overwintering onion sets in free-draining soil. Protect freshly planted sets if birds pull them out.
• Clear finished healthy crops to the compost heap. Remove badly diseased plant material rather than spreading the problem through homemade compost.
• Sow hardy broad beans only where the site and chosen variety suit autumn sowing; in cold, wet or exposed gardens it is often safer to wait until spring.
• Cut asparagus fern to ground level only after it has turned yellow or brown. Remove the old fern from the bed and weed carefully without damaging the crowns.
• Check stored apples, pears, onions and squashes each week, removing anything that is soft or rotting.
• Inspect codling-moth traps, record the season’s catch and note whether replacement lures or kits will be needed next year.

For soil preparation, composting and crop-planning principles, see GardenAdvice’s organic vegetable gardening guide.

Lawns

Remove fallen leaves regularly before they block light and hold moisture against the grass. Leaves can be composted or stored separately for leaf mould; see GardenAdvice’s advice on autumn leaves and lawns. Continue mowing only when the lawn is dry enough, raising the cutting height as growth slows.

Overseeding with grass or microclover is now weather-dependent. It is still possible in a mild, sheltered garden if the soil remains warm, but germination will be slow or unreliable once temperatures fall. Rake the surface to create a seedbed, ensure good seed-to-soil contact by treading or rolling, apply only a very light screened topdressing and keep the area evenly damp for roughly 14–18 days. If those conditions cannot be maintained, postpone the work until spring.

Ponds and wildlife

• Remove fallen leaves before they sink and decay. A well-fitted net can help where trees are shedding heavily, but check that wildlife cannot become trapped.
• Twist blanket weed around a cane or stick and lift it out gently. Leave it beside the pond briefly so small creatures can return to the water, then compost it.
• Thin only excessive aquatic growth and avoid a complete clear-out. Leave some stems and cover for overwintering wildlife.
• Check pumps and filters, but avoid unnecessarily disturbing the bottom of a wildlife pond as temperatures fall.

See the GardenAdvice guide to controlling blanket weed.

Pest, disease and pruning checks

• Collect fallen rose leaves affected by black spot or rust and dispose of them rather than adding them to a cool compost heap.
• Check winter pots, new planting and sheltered corners for slugs and snails after mild, wet nights.
• Inspect container roots for vine-weevil grubs, particularly before moving plants under cover.
• Do not prune magnolias or spring-flowering shrubs simply as part of the autumn tidy-up; pruning now can remove next year’s flowers.
• Leave attractive seed heads, ornamental grasses and sound hollow stems where they provide winter structure and wildlife shelter.
• Wait until roses and deciduous fruit trees are dormant and their leaves have fallen before considering an approved winter wash. Follow the current product label and never spray in frost, rain or strong wind.

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