OCTOBER IN THE GARDEN

10 autumn jobs, one clear next step.

Protect next year’s flowers, finish the harvest, and help indoor plants bloom.

For Northern Hemisphere autumn. Let your local weather and plant type set the timing.

By jennyzhuang

A panicle of white hydrangea flowers surrounded by green leaves.
Panicle hydrangea ‘Jane’; identify your own type before pruning. Photo: Randy Harter · CC BY 4.0. Resized; full frame retained.

Hydrangea fall pruning

Identify the hydrangea before cutting: brown flowers do not mean every stem should go.

Yellow, white and mauve chrysanthemum blooms with upright stems and lobed leaves.
Chrysanthemum blooms; appearance alone does not establish winter hardiness. Photo: KENPEI · CC BY-SA 3.0. Resized; full frame retained.

Keep autumn mums

Check what you bought and how much growing time remains before choosing the garden or a protected pot.

A white single peony flower with yellow stamens among dark green leaves.
Herbaceous peony ‘Krinkled White’; a flower reference, not a division example. Photo: David J. Stang · CC BY-SA 4.0. Resized; full frame retained.

Fall peony division

Divide only when you have a reason, keep buds attached to sound roots, and prepare the new site first.

Long blue-green garlic leaves growing from garden soil beside other vegetables.
Garlic growing in a garden bed; this is not a planting-depth demonstration. Photo: Christian Ries · CC BY-SA 3.0. Resized; full frame retained.

Plant garlic in fall

Choose your local planting window first, then give each clove a sunny, well-drained place for the winter.

Pendant pink Christmas-cactus flowers on flattened green stems with rounded edges.
Christmas cactus in flower; this photograph does not diagnose bud drop. Photo: Joe deSousa · CC0 1.0. Resized; full frame retained.

Christmas cactus bud drop

When unopened buds drop, check recent changes and the potting mix before changing the feeding routine.

Pink Hippeastrum flowers above tall stalks and strap-shaped leaves in an indoor pot.
Hippeastrum ‘Vera’ in bloom; a plant reference, not a reblooming result. Photo: Cindy Christian · CC BY 4.0. Resized; full frame retained.

Amaryllis reblooming

A healthy bulb needs stored energy; a planned cool rest can help schedule flowering but does not guarantee a holiday bloom.

Several green tomatoes attached to fuzzy green stems among tomato leaves.
Green fruit on the vine; colour alone cannot confirm readiness to ripen indoors. Photo: Chris Haines · CC BY-SA 3.0. Resized; full frame retained.

Ripen green tomatoes indoors

Mature fruit can continue ripening off the vine; small immature tomatoes need a different plan.

Published · Updated

AUTUMN CARE · OCTOBER 15

Fragrant blooms, careful covers, the right soil.

Clusters of small cream-yellow Osmanthus fragrans flowers beside glossy green leaves.
Fragrant osmanthus in flower, photographed in October; bloom timing varies by climate and cultivar. Photo: Juni · CC BY 2.0. Resized; full frame retained.

Osmanthus in autumn

Enjoy the autumn scent, keep roots evenly moist and check winter hardiness before planting out.

Three photographs show rose stem cuttings, cuttings in potting mix and the pot enclosed by a clear plastic bottle.
Rose cuttings under a clear bottle cover: a humidity-enclosure example, not a bag. Keep any clear cover out of direct sun and check for overheating and decay. Photo: Abrahami · CC BY-SA 4.0. Resized; full frame retained.

Plant bags explained

Choose the purpose first: rooting humidity, cold protection and fruit protection need different covers.

An outdoor azalea shrub with bright pink flowers, green leaves and woody branches.
Azaleas are one example of acid-loving plants; flowers cannot tell you the pH of your soil. Photo: IsSlym · CC BY-SA 4.0. Resized; full frame retained.

Acid-loving plants

Azaleas, rhododendrons, blueberries and several other favourites need acidic conditions. Test first, then choose the plant.

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