Celebration Maple

Celebration is the trade name for ‘Celzam’, a cultivar of Acer x freemanii (Freeman Maple, the hybrid of red maple and silver maple) discovered in 1967 as a chance seedling at Indian Point Farm in Perry, Ohio. It was selected and developed by James W. Zampini of Lake County Nursery (originally assigned to New Plants, Inc.), who recognized a combination rare among Freeman Maple seedlings: functional seedlessness paired with a tight, well-structured branching habit. U.S. Plant Patent 7,279 was filed December 27, 1988 and granted July 24, 1990, describing the tree as ‘substantially seedless’ due to sterile pollen and non-viable ovules, with an ‘extremely dense upright structure’ carrying branches at approximately 45-degree angles. The patent expired July 24, 2007, and the cultivar is now propagated and sold royalty-free by nurseries nationwide; ‘Celebration’ remains the widely used trade name in the industry. Celebration was bred to directly address the two most common complaints about earlier Freeman Maple selections such as Autumn Blaze: nuisance seedling/samara litter and storm-prone narrow branch unions with included bark. Softwood cuttings reportedly root at a 98% success rate, which helped the cultivar spread quickly through the wholesale trade after introduction. Since patent expiration it has become a staple ‘improved Freeman Maple’ offering alongside Autumn Blaze and other named selections, particularly favored by municipalities and landscapers who want fast canopy establishment without volunteer seedlings or a recurring storm-damage liability.

Celebration adapts to a wide range of soils — clay, loam, or sand — and, like other Freeman Maple selections, shows less iron/manganese chlorosis on alkaline sites than either red maple or silver maple grown alone, though very high pH (above roughly 7.5) can still trigger interveinal yellowing on strongly calcareous sites. It tolerates both brief waterlogging and moderate drought once established, but performs best with consistent moisture through its first two growing seasons. Full sun produces the densest branching and best fall color; partial shade is tolerated but slows growth and thins the crown. Because the cultivar's mature spread (20-35 ft) runs narrower than Autumn Blaze's (30-40 ft), it fits somewhat tighter residential and street-tree sites, though the shallow, fibrous root system still spreads well beyond the drip line and warrants at least 25-30 feet of clearance from foundations, pavement, and utilities. Prune in late summer, early fall, or deep winter dormancy; avoid late-winter and early-spring cuts, when sap pressure is highest and wounds bleed heavily. Because the cultivar can sucker at pruning wounds or trunk injuries, make clean cuts, avoid unnecessary wounding, and remove root suckers promptly. The tree's naturally open, wide-angled branch structure means less corrective structural pruning is needed in the first decade than with narrower-angled Freeman Maple selections.

USDA Hardiness Zone: 4-8
AHS Heat Zone: 2-8
Sun Requirements: Full Sun to Partial Shade
Soil pH: Adaptable, acidic to slightly alkaline (5.5-7.5); more tolerant of high-pH soils without chlorosis than red or silver maple parent species, though very alkaline soils can still induce mild iron/manganese chlorosis
Soil Type: Highly adaptable — clay, loam, or sandy soils; tolerates alkaline soil better than either red maple or silver maple grown alone
Soil Drainage: Well-drained preferred but adaptable to occasionally wet or occasionally dry sites
Water Requirements: Medium; tolerates brief wet spells and moderate dry spells once established
Drought Tolerance: Moderate; tolerates some drought once established
Heat Tolerance: Moderate to High; reliable through USDA zone 8, with some retail sources noting workable performance into zone 9 given adequate moisture
Plant Spacing: 30-40 ft apart; minimum 25 ft from structures and infrastructure
Container Suitability: Not suitable; large shade tree requiring ground planting
How to Prune: Prune in late summer, early fall, or winter dormancy; avoid late-winter/early-spring cuts when sap flow is heaviest. The cultivar can sucker at pruning wounds or trunk injuries, so make clean cuts, avoid unnecessary wounding, and remove root suckers promptly; remove dead, diseased, or crossing branches and clean tools between cuts

Celebration develops an upright-pyramidal to broadly oval crown, 40-50 feet tall and 20-35 feet wide at maturity — a somewhat more compact footprint than other Freeman Maple selections. Its defining structural trait is an open, symmetrical branching pattern with wide, roughly 45-degree branch angles and a well-defined central leader, a marked improvement over the acute, bark-included crotch angles that make some other Freeman Maple selections prone to splitting in storms and ice. Growth is fast, especially in youth — up to 4-5 feet per year during the first several years per the original plant patent — moderating as the tree matures. New spring foliage emerges salmon-red before maturing to deep green through the growing season, on leaves that are palmately lobed like the silver maple parent. Reproductively, Celebration is functionally a male selection: its flowers are perfect in structure but produce sterile pollen and non-viable ovules, so the tree sets essentially no viable seed — a deliberate breeding outcome, not merely an incidental hybrid-sterility side effect as in some other Freeman Maple selections. Root architecture remains shallow and fibrous like other Freeman Maples, spreading well beyond the drip line and requiring generous clearance from hardscape.

Mature Height: 40-50 ft tall
Mature Spread: 20-35 ft wide
Growth Habit: Upright-pyramidal to broadly oval crown with a well-defined central leader and open, wide-angled (~45°) branching; this markedly reduces the included-bark/narrow-crotch-angle weakness common in other Freeman Maple selections, giving Celebration Maple better resistance to storm, ice, and snow damage
Growth Rate: Fast; 4-5 feet per year during the first several years per the original plant patent, moderating with maturity
Foliage Type: Deciduous
Food Forest Layer: Canopy
Permaculture Role: Canopy shade tree; low-litter wildlife habitat tree; windbreak; urban/street tree; carbon sequestration
Leaf Color: Salmon-red new growth in spring, maturing to deep green through summer
Fall Foliage Color: Golden yellow to orange, sometimes with red highlights — more yellow-forward than the red-to-scarlet fall color of other Freeman Maple selections like Autumn Blaze
Thorns?: No
Attracts Wildlife: Bees and other pollinators (showy red flowers before leaf-out); birds (nesting/cover); minimal samara production limits seed-based wildlife food compared with other maples
Life Span: likely 60-100 years under good conditions, typical for Freeman Maple hybrids; the cultivar's improved branch structure may reduce storm-related structural failure compared with other Freeman Maple selections, though direct longevity data specific to 'Celzam' is not yet well documented (patented 1990)

Like other Freeman Maples, Celebration is wind-pollinated and blooms in early spring — roughly mid-March to mid-April in USDA Zone 7 — before the leaves emerge, with small but showy clusters of red flowers held along the bare branches. This early bloom window makes it a valuable nectar and pollen source for honeybees and native bees emerging from overwintering, at a time when few other trees are in flower. No pollinator is required for the tree to perform ornamentally, and uniquely among Freeman Maple selections this isn't merely a landscape convenience: the cultivar was specifically bred and patented for functional seedlessness, producing sterile pollen and non-viable ovules, so it will not set a meaningful fruit crop even next to a compatible pollinator. This makes Celebration a preferred choice over seed-producing maples for sites where volunteer seedlings and samara litter (in lawns, gutters, and planting beds) are a maintenance concern, such as parking lots, patios, and street-tree plantings.

Bloom Season: Late
Bloom Window: Mid Mar - Mid Apr
Pollination Requirements: Not required — grown for ornamental value. Wind-pollinated; bred to be substantially seedless due to sterile pollen and non-viable ovules, so no pollinator is needed and viable seed set is negligible regardless
Pollination Mechanism: Wind-pollinated; showy red flowers also provide early pollen/nectar for bees
Flower Color: Red; showy small clusters on bare branches before leaf emergence — more visually prominent than the inconspicuous flowers of some other Freeman Maple selections

Celebration is grown for form, structure, and fall color rather than fruit. Because the cultivar was specifically patented for 'substantially seedless' flowering — sterile pollen combined with non-viable ovules — it produces little to no viable samara crop, distinguishing it from Autumn Blaze and other Freeman Maple selections that still shed some seed most years. This is a genuine landscape advantage on sites where germinating maple seedlings or samara litter in gutters, lawns, and planting beds are unwanted maintenance. As in other Freeman Maples, the sap is technically tappable but at a sugar concentration well below Acer saccharum (sugar maple), making syrup production impractical at any meaningful scale. There is no commercial harvest, ripening window, or culinary use associated with this selection.

Verticillium wilt (Verticillium dahliae) is the most serious disease risk for Celebration, as it is for silver maple and other Freeman Maple selections: the fungus persists in soil for years, is incurable once established, and can kill the tree outright. Prevention through site selection — avoiding soil where solanaceous crops (tomatoes, peppers) or strawberries have recently grown — and avoiding root injury during planting are the only practical defenses. Nectria canker is especially common on red and sugar maple parentage; it typically enters through pruning wounds or storm damage and is rarely fatal to an otherwise healthy tree, but clean cuts and dormant-season pruning reduce risk. Tar spot has been specifically noted on Celebration in nursery trade literature; it causes conspicuous black-spotted leaves in cool, wet springs but is a cosmetic problem across nearly all maple species, controlled by raking and destroying fallen leaves. Bacterial leaf scorch (Xylella fastidiosa), a leafhopper-vectored, incurable vascular disease documented on red maple, is a longer-term concern in warmer parts of the range; there is no cure once symptoms (marginal leaf scorch with a yellow halo) appear, only removal of severely declining trees. Maple leaf spot (Phyllosticta) is common but rarely more than cosmetic, again controlled by leaf sanitation. Among insects, Asian longhorned beetle is a regulated quarantine pest that prefers maples — including both red and silver maple, Celebration's parent species — over most other hardwoods; report round exit holes and sawdust-like frass to the state department of agriculture immediately. Cottony maple scale, whose primary hosts are silver maple and boxelder, and maple bladder gall mite, which is especially associated with silver maple, both appear on Celebration via its silver maple parentage; dormant horticultural oil controls both, and neither typically causes lasting harm despite conspicuous appearance. Forest tent caterpillar is a broad hardwood generalist that red maple specifically tends to escape thanks to a natural chemical deterrent; as a hybrid, Celebration likely retains only partial benefit from this trait, making it moderately tolerant rather than fully resistant.

Verticillium Wilt: Susceptible
Nectria Canker: Moderately Susceptible
Tar Spot: Moderately Susceptible
Bacterial Leaf Scorch: Moderately Susceptible
Maple Leaf Spot / Phyllosticta Leaf Spot: Moderately Resistant
Asian Longhorned Beetle: Susceptible
Cottony Maple Scale: Moderately Susceptible
Maple Bladder Gall Mite: Moderately Susceptible
Forest Tent Caterpillar: Moderately Resistant

• This is the low-litter Freeman Maple: Celebration's patented 'substantially seedless' trait (sterile pollen, non-viable ovules) means far less volunteer-seedling and samara cleanup than Autumn Blaze or seed-bearing maples — a real selling point for patios, parking lots, and street-tree sites.
• Expect less corrective pruning: The naturally wide, ~45-degree branch angles and strong central leader mean Celebration needs less structural correction in its first decade than narrower-angled Freeman Maple selections, though a young-tree training pass is still worthwhile.
• Avoid unnecessary trunk wounds: The cultivar can sucker at pruning cuts or trunk damage — use clean cuts, avoid mower/string-trimmer injury at the base, and remove any suckers promptly.
• Verticillium site history still matters: Never plant where tomatoes, peppers, or strawberries have grown recently — the pathogen persists in soil for years and there is no cure once a tree is infected.
• Monitor for Asian longhorned beetle in regulated counties: Both parent species (red and silver maple) are preferred ALB hosts. Check your state's quarantine map annually and report round exit holes (roughly 3-8 mm) or sawdust-like frass immediately.
• Soil pH is more forgiving than Autumn Blaze, not chlorosis-proof: Celebration tolerates alkaline soils better than either parent species, but a soil test is still worthwhile on strongly calcareous sites.

Our 365-Day Plant Guarantee: We ensure that our plants are delivered to you alive and healthy. If your plant does not survive its first year, you're eligible for store credit under these conditions:

1. Your location falls within the appropriate USDA hardiness zone for the plant variety (refer to our hardiness zone map).
2. You maintain the roots' moisture and plant within three days of delivery, following the instructions in our Planting Guide.

If you're concerned about your plant's health, please consult our guide, How to Tell if Your Tree is Dead or Dormant. Remember, our plants are shipped in a dormant state and may leaf out at different times based on their species. To check for plant vital