Acer rubrum 'October Glory' (October Glory Red Maple) care

Light

Acer rubrum 'October Glory' needs sun on the leaves, not just bright ambient room light. Full sun gives the strongest, most uniform red autumn colour and best form; tolerates light part shade, but colour is muted and the canopy thinner with less light. A south or west-facing windowsill in the northern hemisphere is the default; anywhere else, expect the plant to stretch and pale out within a season.

Watering

Water acer rubrum 'october glory' weekly while establishing; deep watering in dry spells thereafter. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. Keep young trees consistently moist for the first few years. Red maple prefers steady moisture and tolerates short wet periods; water mature trees deeply during summer droughts to prevent early leaf drop.

Soil and pot

Acer rubrum 'October Glory' grows best in moist, well-drained, slightly acid soil. Prefers fertile, moisture-retentive soil on the acid side. On alkaline or chalky ground it is prone to chlorosis (yellowing between leaf veins). Tolerates clay and occasional flooding better than most maples. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Acer rubrum 'October Glory' sits happiest at around Ambient outdoor humidity and -30 to 35°C (-22 to 95°F). A landscape shade tree with no special humidity needs; thrives across normal temperate humidity in both North American and British conditions. If you keep the room above year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed acer rubrum 'october glory' sparingly. A spring mulch and, on poor soils, a balanced slow-release fertiliser in early spring keep it vigorous. On alkaline ground, use an acidifying or iron-chelate feed to counter chlorosis. Avoid late-season high-nitrogen feeding, which can soften autumn colour. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on acer rubrum 'october glory' in the Growli community. Each is annotated with the most common cause so you know where to start.

• Chlorosis on alkaline soil — Leaves yellow between green veins on chalky or high-pH ground due to iron/manganese lock-out. Plant in acid to neutral soil or treat with chelated iron and acidifying mulch.
• Verticillium wilt — This soil-borne fungus can cause sudden branch dieback and wilting. There is no cure; prune out affected limbs, keep the tree vigorous, and avoid replanting maples in known infected soil.
• Girdling roots and surface rooting — Shallow, vigorous roots can lift paving and circle the trunk. Plant away from hard surfaces and check container-grown stock for circling roots before planting.
• Aphids and sooty mould — Aphid colonies excrete honeydew that fosters black sooty mould on leaves and anything beneath. Tolerate light infestations or wash off; encourage natural predators rather than spraying.

Propagation

As a named cultivar it does not come true from seed. Propagate by softwood cuttings under mist in early summer, or commercially by budding or grafting onto Acer rubrum seedling rootstock to preserve its autumn colour and form. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Acer rubrum 'October Glory' is pet-safe. The ASPCA lists Red Maple (Acer rubrum) as non-toxic to dogs and cats, so this cultivar is considered pet-safe for them. Important: red maple is TOXIC to horses — wilted or dried leaves contain tannins/gallic acid converted to pyrogallol, causing severe haemolytic anaemia. Keep prunings and fallen leaves away from horses. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Acer rubrum 'October Glory' deep-dive guides

Every aspect of acer rubrum 'october glory' care, each with its own calibrated guide:

• Acer rubrum 'October Glory' watering schedule
• Acer rubrum 'October Glory' light requirements
• Best soil mix for acer rubrum 'october glory'
• Acer rubrum 'October Glory' fertilizing guide
• When to repot acer rubrum 'october glory'
• How to propagate acer rubrum 'october glory'
• Acer rubrum 'October Glory' growth rate & size
• Acer rubrum 'October Glory' cold hardiness
• Acer rubrum 'October Glory' temperature & humidity
• Is acer rubrum 'october glory' toxic to cats & dogs?
• Is acer rubrum 'october glory' toxic to cats?
• Is acer rubrum 'october glory' toxic to dogs?
• Getting acer rubrum 'october glory' to bloom

Featured in these plant shortlists

Acer rubrum 'October Glory' qualifies for 12 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best pet-safe houseplants — Houseplants the ASPCA lists as non-toxic to cats and dogs — every one verified against the ASPCA toxic and non-toxic plant list.
• Best drought-tolerant houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• Best pet-safe low-maintenance plants — Non-toxic to cats and dogs and forgiving of forgotten watering — the easiest safe choices for a busy pet household.
• Best pet-safe flowering plants — Flowering houseplants the ASPCA lists as non-toxic to cats and dogs — colour and blooms in a pet home, without the worry.
• Best pet-safe plants for bright light — Non-toxic to cats and dogs and happy in a bright, sunny spot — safe plants for your best-lit windowsill.
• Best pet-safe large indoor plants — Big, floor-standing houseplants the ASPCA lists as non-toxic to cats and dogs — a statement plant that is safe around pets.
• Best houseplants for full sun — Houseplants that want direct sun — the species for a hot south or west-facing windowsill where shade-lovers scorch.
• Best houseplants for a cool room — Houseplants that tolerate cool conditions down to about 10°C — for an unheated spare room, hallway, porch or a home kept cool.
• Best fast-growing houseplants — Houseplants documented as fast or vigorous growers — quick to fill a pot, cover a pole or trail down a shelf.
• Best cat-safe plants — Houseplants the ASPCA lists as non-toxic to cats (and dogs) — safe greenery for a home with a curious cat.
• Best dog-safe plants — Houseplants the ASPCA lists as non-toxic to dogs (and cats) — safe greenery for a home with a curious dog.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

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Acer rubrum 'October Glory' is also commonly called October Glory Red Maple.

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