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Columnar broad-leaved seedless tree
Sapindaceae
Érable rouge colonnaire pour espace étroit
Red Rocket Red Maple
Acer rubrum
Red Rocket is a columnar red maple selected for its very narrow form, hardiness, and autumn color. Hailing from Minnesota, it reaches about 11.5 to 12 m in height and 4.5 m in width. Its green leaves turn orange-red to bright red in autumn. This seedless cultivar produces no samaras. Hardy in zone 3, it prefers full sun and cool to moist, well-drained, neutral to acidic soil. It is suitable for entrances, narrow streets, and properties where width is limited, provided its adult height and root zone are fully unobstructed.
- Exposure
- Full sun; light partial shade is tolerated but may reduce autumn color
- Hardiness
- Zone 3
Discover the plant
Common nameRed Rocket Red Maple
FamilySapindaceae
GenusAcer
Speciesred
CultivarRed Rocket
TypeColumnar broad-leaved seedless tree
Botanical nameAcer rubrum
The Red Rocket Red Maple (Acer rubrum 'Red Rocket') forms a narrow, upright column that maintains its shape as it ages. Originating from Minnesota and introduced by the U.S. National Arboretum, this cultivar is among the most cold-hardy red maples. It reaches approximately 11.5 to 12 m in height and 4.5 m in width, a useful proportion when lateral space is limited. Its three-lobed green leaves turn orange-red to bright red in autumn. Unlike many red maples, Red Rocket is seedless and therefore produces no samaras.
In Quebec, plant this red maple in full sun for the best color, in cool to moist, well-drained, neutral to acidic soil. It tolerates temporarily wet sites but reacts poorly to alkaline soils, compaction, and de-icing salts. Water deeply during the first two seasons, keep the root collar at ground level, and maintain 5 to 8 cm of mulch away from the trunk. Hardy in zone 3, Red Rocket is suitable for cold regions. Its rather slow to moderate growth facilitates shaping, but the young tree must maintain a central leader and well-spaced branches.
Choose Red Rocket to line an entrance, structure a small lot, create a vertical accent, or replace a Norway maple in a narrow space. Nevertheless, plan for its full adult height, keep it away from wires, and protect a permeable root zone. The species Acer rubrum is native to Quebec and supports local biodiversity, even if a seedless cultivar offers less food than the fertile species. The ASPCA classifies it as non-toxic to dogs and cats; however, its withered leaves are highly toxic to horses. Do not plant it near an equine pasture and promptly remove any fallen branches.
Planting guide
From planting to establishment.
Spacing / density
Space at least 4.5 to 5 m (15 to 16 ft) for the mature crown
Best planting time
Spring or early fall, with enough time for rooting before the first frost
Propagation
Professional vegetative propagation to faithfully preserve the seedless cultivar
Soil and care
The right care,at the right time.
Soil pH
Acidic to neutral, ideally around 5.0 to 7.0
Minimum temperature
-40 °C (-40 °F)
Care level
Low to moderate
Watering
Water slowly and deeply after planting, then keep the root ball and surrounding soil consistently moist for the first two seasons. Check moisture under the mulch before each watering. During hot or dry periods, expand watering to the entire root zone rather than just wetting the trunk. Once established, Red Rocket still prefers regular moisture. Avoid small daily waterings, a dried-out root ball, and standing water against the crown.
Soil type
Choose a cool to moist, fertile, well-drained soil, with an acid to neutral reaction. Red Rocket tolerates short periods of wet soil, but not a constantly waterlogged pit. Loosen a large area, place the root collar at ground level, and avoid compacted backfill, limestone, and de-icing salts. In alkaline soil, red maple may develop chlorosis and lose vigor.
Fertilization
In a properly prepared, fertile soil, a thin layer of mature compost in the spring and an organic mulch are usually sufficient. If leaves turn yellow between the veins, have the soil and its pH analyzed before adding fertilizer: in red maples, alkaline soil often blocks iron. Correct drainage, compaction, or pH first. Avoid high doses of nitrogen, trunk treatment products, and any late fertilization before the Quebec winter.
Moisture
Cool to moist soil; tolerates brief wet periods
Seasonal care
In spring, inspect the trunk, root collar, leader, and main forks after the snow melts. Remove tight ties, replenish 5 to 8 cm of mulch without touching the bark, and water when rainfall is scarce. Observe the small red flowers, but do not expect any samaras as the cultivar is seedless. In summer, check soil moisture, drainage, and compaction if leaves turn pale, brown, or fall off. Interveinal chlorosis often indicates a pH that is too high; have the soil analyzed before fertilizing. Also, monitor for aphids, scale insects, leaf spots, cankers, and verticillium wilt, then obtain a diagnosis before any treatment. Prune only dead, broken, diseased, or crossing wood, ideally after leaves have emerged to limit sap flow. Maintain a central leader and never top the tree. In autumn, water deeply before frost if the soil is dry and collect fallen branches. In winter, keep salted snow away from the roots and protect the young trunk from rodents without tightening the guard. After a storm, have a crack or large branch evaluated by an arborist. Year-round, keep wilted leaves out of reach of horses, keep the root collar visible, and keep mowers away from the trunk. Also, check the bark after thaws, clean tools between trees, and note watering dates to objectively track recovery.
Bloom and dimensions
Its place,in your garden.
Mature height
11.5 to 12 m (38 to 40 ft)
Width / spread
About 4.5 m (15 ft)
Flower color
Red, discreet
Foliage color
Green in summer; orangey-red to bright red in autumn
Foliage type
Obsolete
Growth rate
Slow to moderate for a columnar maple
Growth habit
Upright, very narrow, and columnar
Bloom period
Small red flowers appear early in spring before or with the leaves. They add subtle interest and can provide pollen for early insects. Red Rocket, however, is a seedless cultivar: its flowering does not lead to the production of samaras. This characteristic clearly distinguishes this clone from many fertile red maples and keeps the ground free of winged fruits and volunteer seedlings.
Fruiting
Red Rocket is a seedless cultivar and produces no samaras. This lack of fruiting prevents winged seeds from falling onto pavement and spontaneous seedlings from appearing around the tree. However, it reduces the food source available to birds and small mammals compared to a fertile red maple. Therefore, supplement your landscaping with native fruit-bearing trees and shrubs, while still enjoying the narrow silhouette and autumn color characteristic of this clone.
Garden associations
In goodcompany.
Companion plants
Pair Red Rocket with serviceberries, viburnums, chokeberries, dogwoods, weigelas, sedges, ferns, and other native plants suitable for cool, well-drained soil. Fruit-bearing shrubs compensate for the absence of samaras for birds, while perennials cover the ground without competing with a mowed lawn against the trunk. Install companion plants towards the periphery of the future canopy, without cutting roots or covering the root collar. Avoid invasive species, plants that require alkaline soil, and large shrubs that would trap the lower branches. Maintain a wide ring of mulch accessible for watering and inspection.
Wildlife and pets
Life,around your plants.
Supporting wildlife
The red flowers in early spring can provide pollen to certain insects, and the crown offers perches, cover, and nesting sites. As Red Rocket does not produce samaras, add native fruit-bearing shrubs to provide more food for birds and small mammals.
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