Final Fire® hybrid maple (Acer × pseudosieboldianum ‘IsFinFi’)

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Un arbre étalé à feuilles rouges se dresse devant une maison en pierre. Plusieurs branches sombres restent visibles sous la couronne vive au-dessus d’une pelouse verte et de fleurs. Le cadrage réunit les contours, les couleurs et les textures visibles. Les zones claires contrastent avec les ombres plus profondes. Des formes voisines se superposent par endroits et permettent de suivre la composition du sujet représenté dans cette image.

Small ornamental deciduous hybrid tree Sapindaceae

Hardy maple with extended fall colour

Pépinière.ca

Sold as Trees

Common nameFinal Fire® hybrid maple

FamilySapindaceae

GenusAcer

Species× pseudosieboldianum

CultivarIsFinFi (Final Fire®)

Plant typeSmall ornamental deciduous hybrid tree

Botanical nameAcer × pseudosieboldianum ‘IsFinFi’

Final Fire® hybrid maple (Acer × pseudosieboldianum ‘IsFinFi’) is an Iseli Nursery Pacific Rim® selection developed from Japanese and Korean maple genetics. This small deciduous tree begins with a broad upright crown that becomes more rounded with age, supported by a sturdy, well-branched framework. New leaves emerge in pastel shades of yellow, pink and green, then mature to green with orange-red highlights through summer. Its unusually long autumn display moves from orange to wine red and finishes fire-engine red. Allow approximately 6 m in height and 4.5 m in spread at maturity, with annual growth commonly reported at about 30 to 38 cm.

Across Canada, grow Final Fire® in full sun or partial shade in a location protected from drying winds. Morning sun with light late-day shade helps limit leaf scorch on hot urban sites. Choose fertile, organic-rich, evenly moist, well-drained soil, preferably with a slightly acidic to neutral reaction. Water deeply through the first two growing seasons and prolonged dry periods without saturating the root ball. Keep the root flare visible and spread 5 to 8 cm of mulch without touching the trunk. Avoid road salt, compaction and excessive nitrogen, which can encourage soft late growth before winter.

Use Final Fire® as a specimen in a residential yard, near a patio, within a Japanese-inspired garden or at the edge of a layered woodland planting. Reserve room for the mature crown from the beginning and keep it clear of overhead wires, foundations and paving. Small spring flowers are followed by winged samaras, while the sturdy branching silhouette remains attractive after leaf drop. Preserve its natural form with light pruning limited to dead, damaged or crossing wood. This horticultural hybrid is not indigenous to Canada; combine it with regionally native shrubs and perennials to strengthen habitat value and landscape diversity.

In the garden

Exposure: Full sun to partial shade; protect from dry wind and intense late-day sun
Life cycle: Vivace ligneuse
Hardiness: Zone 5

Planting guide

Planting & establishment

Growing method

Plantez Érable hybride Final Fire au printemps ou au début de l’automne, lorsque le sol se travaille facilement et que vous pouvez assurer l’arrosage. Réservez d’abord l’espace nécessaire à la couronne et aux racines adultes; la petite taille du plant acheté ne détermine pas l’espacement définitif. Vérifiez le drainage avant de creuser et gardez la motte humide pendant la préparation. Repérez les premières grosses racines près du tronc et utilisez ce collet, plutôt que le dessus du terreau meuble, pour déterminer la profondeur de plantation. Creusez une fosse plus large que la motte sans enfouir le tronc. Retirez le contenant et examinez les racines qui tournent; demandez conseil à la pépinière si elles sont fortement déformées. Déposez l’arbre bien droit sur une assise ferme, remblayez surtout avec la terre extraite et arrosez lentement pour stabiliser le sol. Étendez un paillis organique en dégageant l’écorce et le collet. Contrôlez l’humidité dans la motte originale et dans le sol voisin, car ils peuvent sécher différemment. Utilisez des tuteurs seulement si l’arbre manque de stabilité, avec des attaches larges inspectées régulièrement. Durant la première saison, protégez le tronc des appareils de tonte et adaptez l’arrosage à la chaleur, au vent et aux périodes sèches. Au Québec, terminez la plantation automnale assez tôt pour surveiller l’établissement avant le gel du sol. Choisissez soleil à mi-ombre et un sol régulièrement humide et bien drainé, à l’abri des vents desséchants. Vérifiez l’humidité pendant l’établissement et gardez le collet visible. Il s’agit des dimensions indicatives de jardin d’Iseli, sans maximum adulte fixe.

Soil and care

Soil & care

Watering

Moderate; keep soil evenly moist during establishment and prolonged drought

Soil type

Fertile, organic-rich, evenly moist and well-drained; slightly acidic to neutral

Fertilization

In fertile soil, organic mulch and a thin surface layer of mature compost are generally sufficient. If growth appears weak, test the soil before applying a labelled tree fertilizer. Avoid heavy nitrogen, products placed against the trunk and late-season feeding, which can extend soft growth before winter. Steady growth creates a stronger framework than forced growth and reduces unnecessary maintenance. Correct moisture and drainage before assuming that fertilizer will solve pale or limited growth.

Seasonal care

In spring, inspect the trunk, graft union, root flare and main branch unions after snowmelt. Restore 5 to 8 cm of mulch without covering bark, remove tight ties and water when rainfall is inadequate. Compare bud break across several branches before declaring winter injury. In summer, check moisture, drainage and compaction whenever leaf margins brown; young foliage can also be damaged by dry wind and intense sun. Watch for aphids, scale insects, leaf spots and Verticillium symptoms, then obtain a diagnosis before treating. Prune after leaves expand or during dormancy to remove only dead, broken, diseased or crossing wood. In autumn, water deeply before freeze-up when soil is dry and collect heavily spotted leaves. In winter, keep salt-laden snow outside the root zone and protect a young trunk from rodents without binding the guard. Clean tools between trees, never top the crown and have major cracks assessed by a qualified arborist. Reassess clearance from buildings, wires and paving periodically. Record heat, irrigation and damage events to separate site stress from recurring pest or disease problems. After storms, look for split branches, torn unions and damaged ties. Remove winter guards before heat builds and keep mowers outside the mulch ring. During drought, direct water across the full developing root zone rather than applying small amounts at the trunk. Inspect leaves from several parts of the crown before diagnosing a disorder. Check drainage during snowmelt and protect soil from construction traffic. If repeated scorch occurs, review afternoon exposure, wind and rooting volume before applying products. Replace damaged guards promptly but never fasten them tightly around expanding bark.

Container growing

Growing in a large container is possible during the tree’s early years, particularly where garden space is limited, but this maple performs best in the ground over the long term. Choose a broad, stable container with excellent drainage holes and fill it with an organic-rich yet well-aerated growing medium. Monitor watering more frequently than for an in-ground tree because container roots dry quickly. In Quebec and similar Canadian climates, roots confined in pots are also more vulnerable to winter cold, so substantial insulation or overwintering in a cold, sheltered location is required.

Des feuilles rouge vif finement dentées aux lobes pointus profondément découpés se superposent dans le cadre, avec des rameaux rougeâtres fins visibles dans les espaces ombragés. Le cadrage réunit les contours, les couleurs et les textures présents dans la photographie. Les surfaces claires et les ombres profondes distinguent les formes représentées. Les détails restent visibles dans la composition et permettent de suivre la disposition du sujet principal et des éléments environnants.

Size, flowering & harvest

Mature height

Approximately 6 m (20 ft)

Width / spread

Approximately 4.5 m (15 ft)

Foliage color

Pastel yellow, pink and green in spring; green with orange-red highlights in summer; orange, wine red then fire-engine red in autumn

Foliage type

Deciduous

Bloom period

Small purplish-red flowers appear discreetly in spring before or as leaves unfold. They are not the cultivar’s principal feature, but add seasonal detail and may provide a temporary resource for early-active insects. Abundance varies with tree age, weather and nearby maples. Avoid insecticides during flowering unless a diagnosis and specific need justify treatment. Winged samaras may develop later when pollination succeeds and the tree is mature enough.

Garden associations

Companion plants & uses

Companion plants

Pair Final Fire® with dark green conifers, dogwoods, viburnums, ferns, hostas and white perennials that enjoy fresh, well-drained soil. Regionally native shrubs suited to the site add flowers, fruit and cover for wildlife. Establish companions toward the future crown perimeter without cutting roots or burying the flare. Keep a broad mulch ring open for inspection and watering. Avoid invasive groundcovers, plants requiring frequent digging and large competing trees positioned too close. Similar moisture needs simplify long-term care as shade increases.

Garden use

Place Final Fire® where its changing colour can be viewed from the house, patio or a garden path. Measure for a mature crown approximately 4.5 m wide and set the trunk away from foundations, utilities, paving and overhead wires. In a small yard, use it as the principal tree instead of surrounding it with large competitors. Create a broad mulch ring and curve a permeable path around the root zone. Dark green conifers, dogwoods, ferns and white perennials emphasize both spring pastels and the fire-red autumn finish. Establish companions toward the perimeter to avoid root injury or burying the flare. Expect shade to increase with age and adjust the understory gradually. Direct downspouts elsewhere to prevent alternating flooding and drought, and keep salt-laden snow outside the mulch. A bench positioned at a distance benefits from the silhouette without compacting soil. Diversifying other trees, shrubs and perennials strengthens habitat while allowing Final Fire® to remain the seasonal focal point. Use containers for seasonal flowers instead of repeatedly cultivating beneath the maple. Keep decorations, stored materials and irrigation equipment away from the trunk, and preserve a clear view of the graft union and root flare after snowmelt. As the canopy expands, move sun-loving perennials outward rather than pruning the maple to maintain their original light. Reassess the composition every few years while protecting established roots.

Frequently asked questions

How large does Final Fire® maple grow?

Final Fire® reaches approximately 6 m in height and 4.5 m in spread at maturity, or about 20 by 15 ft. Its habit is broad upright while young and becomes more rounded with age. The breeder reports growth near 30 to 38 cm per year. Measure clearance from the trunk centre and keep buildings, wires, utilities, paving and other large trees away. The 6-gallon sale plant is still young and will gain considerable size. Correct placement allows the natural framework to develop without topping or large future cuts. Climate, soil quality and growing-season length affect how quickly mature dimensions are reached.

What colours does Final Fire® produce through the seasons?

New leaves open in pastel shades of yellow, pink and green. They then mature to green with orange-red highlights through summer. The principal display begins in autumn, when the crown moves first to orange, then wine red and finally fire-engine red before leaf drop. Duration and intensity vary with cool nights, sunlight, soil moisture and tree health. Deep shade can soften some colour, while severe drought may brown leaf margins before the normal transition. Compare several branches and recent weather before assuming that an unexpected tone indicates a pest, disease or incorrect cultivar. Healthy roots support the cleanest seasonal sequence.

Is Final Fire® hardy enough for Canadian winters?

Final Fire® is rated Zone 5 by Iseli Nursery and Canadian grower NVK. It suits Canadian locations whose hardiness zone and microclimate meet that requirement. Choose shelter from prevailing winds, avoid low areas that collect water and stop late nitrogen applications so shoots mature before winter. Water deeply before freeze-up when autumn is dry, then keep salt-laden snow away from the roots. In a zone colder than 5 or an exposed wind corridor, winter injury becomes more likely. Confirm the planting site’s current Canadian hardiness zone and consider local exposure, snow cover, drainage and frost pockets before purchase. Local nursery experience can help interpret borderline sites accurately.

Does Final Fire® prefer full sun or partial shade?

The breeder recommends full sun to partial shade. Across Canada, morning sun with light late-day shade is particularly useful on hot, dry or reflective sites. Full sun can produce strong colour when roots have access to fresh, deep soil, but drying wind, paving and inadequate water increase leaf scorch. Dense shade reduces vigour and may soften seasonal colour. Observe the site’s actual hours of sun, protect a broad root zone with mulch and water deeply through establishment instead of frequently wetting only the trunk area. Exposure should be evaluated together with drainage, soil volume and wind rather than as a single isolated factor.

How should Final Fire® maple be pruned?

Preserve the broad upright crown and perform most structural work while the tree is young. Remove dead, broken or diseased wood, a crossing branch and a weak union before it becomes large. Avoid topping, shearing and repeated cuts intended to contain a tree planted too close to a structure. Maples can bleed heavily in spring, so work after leaves expand or during dormancy in dry weather with clean tools. Remove only a small portion of the crown at one time. Consult a qualified arborist before a large cut or when a crack affects a main scaffold. Correct placement remains the most effective long-term pruning strategy.