Acer henryi
Also known as: Henry's Maple
What's special about Acer henryi
Trifoliate Chinese maple with pendulous flower catkins.
Growing this variety
Acer henryi follows the same growing basics as Acer. Variety-specific maturity above; everything else below applies to the whole Acer family.
Germination
Spacing & depth
How to plant
De-wing samaras if noted. Cold-stratify seed 30–120 days in damp sand or peat at 34–41°F (1–5°C). Sow in deep tree pots with well-drained mix. Keep evenly moist and in bright light after germination. Grow on 1–2 seasons before planting to a permanent site with a wide mulch ring.
Pre-sow treatment
30–120 days cold stratification at 34–41°F (1–5°C); some species need warm+cold double stratification.
Grower's tip
Maples range from tiny Japanese ornamentals to towering shade trees. Most need cold stratification; some benefit from warm+cold double stratification.
Soil preferences
Deep, well-drained native soil. Avoid amending the planting hole heavily — roots should learn to grow into the surrounding earth.
5.5–7.5 depending on species (conifers lean acidic; most hardwoods neutral).
Top-dress with compost and mulch in a wide ring; don't backfill with pure compost.
Watering
Deep soak weekly the first two years while roots establish; taper once the tree self-supports.
Slow trickle at the drip line, not the trunk. A 5-gal bucket with a pinhole is ideal.
Overwatered: yellowing, root rot, mushroom collar. Underwatered: leaf scorch, early leaf drop.
Prefers top-watering — Trees are always top-watered — deep slow soak at the drip line, never at the trunk. Bottom-watering only makes sense for nursery seedlings.
Temperature tolerance
Broad — most species tolerate 40–90°F once established
Down to species-rated USDA zone minimum
Hardy once established; young seedlings need protection their first winter.
Special germination requirements
Most temperate tree seed needs cold stratification (30–120+ days at 34–41°F) — see each species entry for the exact time.
Container growing
Possible with the right cultivar
Deep tree pots (root trainers) for the first 1–2 seasons; permanent site required for full growth.
Only dwarf, patio, or bonsai forms live long-term in containers.
Detailed harvesting
Not applicable for ornamental/timber trees. Nut and fruit species — pick when they drop naturally.
Post-harvest storage & preservation
Nuts: keep damp and cool, sow promptly. Winged/coned seed: dry, cool, dark in a sealed jar.
Culinary, medicinal & other uses
Shade, windbreak, wildlife habitat, timber, ornament, and long-term carbon storage.
Medicinal or traditional uses are shared for interest only — this is not medical advice. Consult a qualified professional before using any plant medicinally.
Seed saving
Wind- or insect-pollinated; seedlings rarely match the parent exactly (especially named cultivars — those must be grafted or cutting-grown).
Not practical for trees. Expect variation.
Collect fully ripe seed in fall, clean, dry or keep damp per species, then cold-stratify before spring sowing.
Your zone's planting calendar
Pick your USDA hardiness zone and we'll estimate the key dates for acer in your area. These are regional averages — always check your own last-frost forecast before sowing.
My Acer henryi Acer notes
Acer henryi Acer seeds on hand
Track packets and loose seeds you already have. Private to your account.
Par level — leave at 0 for no alert. Anything below par shows on Seed Starting and your shopping list.
From your kitchen — grow acer from what you already have
Trees usually mean patience — collect fully ripe seed in fall, clean pulp off, and give most species a cold winter (real or in the fridge) before they'll germinate.
- 1Collect ripe seed/nuts/cones in autumn from a healthy parent.
- 2Clean off any fleshy pulp; dry cones warm to release seed.
- 3Cold-stratify in a bag of damp sand or peat in the fridge (34–41°F) for the time listed on the species.
- 4Sow in deep tree pots and grow on 1–2 seasons before planting to a permanent spot.
Storage: Most tree seed keeps 1–3 years cool and dry; oak/hickory/chestnut nuts must stay damp and be sown promptly.
Order more seeds
Running low? Reorder from one of these seed stores.
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Other Acer varieties
Acer barbinerve
Small East Asian maple with bristly-veined leaves.
Acer buergerianum
Three-lobed leaves and attractive flaking bark; excellent bonsai subject.
Acer calcaratum
Uncommon Southeast Asian maple.
Acer campbellii wilsonii
Himalayan maple with large palmate leaves.
Acer campestre
European hedgerow maple; tolerates hard pruning.
Acer capillipes
Striped green-and-white bark and red new growth.
Acer carpinifolium
Unusual maple with hornbeam-like non-lobed leaves.
Acer caudatifolium
Taiwanese snakebark maple.
Acer caudatum 'Ukurunduense'
Small maple with upright flower spikes.
Acer circinatum
Pacific NW native with brilliant fall color; often multi-stemmed. De-winged seed.
Acer cissifolium
Trifoliate leaves resemble ivy or grape.
Acer davidii
Striking green-and-white striped bark. De-winged seed.
Acer davidii grosseri
Snakebark maple with excellent fall color. De-winged seed.
Acer elegantulum
Chinese maple with graceful form.
Acer fabri
Evergreen or semi-evergreen maple with lance-shaped leaves.
Acer ginnala
Small hardy maple with fragrant flowers and brilliant red fall color.
Acer glabrum douglasii
Small Western North American maple.
Acer griseum
Cinnamon-colored peeling bark and trifoliate leaves.
Acer heldreichii ssp. trautvetteri
Balkan maple with striking red buds.
Acer hyrcanum
Drought-tolerant southeastern European maple.
Acer japonicum
Rounded palmate leaves and superb fall color. Dry seed.
Acer japonicum 'Meigetsu'
Meigetsu Full-Moon Maple selection.
Acer japonicum 'Oisami'
Oisami Full-Moon Maple selection.
Acer japonicum aconitifolium
Deeply cut fern-like leaves; blazing fall color. Dry seed.
Acer mandshuricum
Trifoliate hardy maple with brilliant red fall color.
Acer maximowiczianum
Trifoliate Japanese maple with excellent fall color. De-winged seed.
Acer micranthum
Small-leaved Japanese maple with delicate form.
Acer mono
East Asian maple with clear yellow fall color.
Acer monspessulanum
Drought-tolerant Mediterranean maple with three-lobed leaves.
Acer negundo
Fast-growing tough maple with pinnate leaves.
Acer oblongum
Semi-evergreen Himalayan maple with entire (unlobed) leaves.
Acer palmatum
Classic Japanese Maple; the seed source for most named cultivars.
Acer palmatum 'Aka shigitatsu sawa'
Variegated pink and green Japanese maple selection.
Acer palmatum 'Bloodgood'
Deep burgundy leaves that hold color well into summer.
Acer palmatum atropurpureum
Purple-red leaved Japanese Maple strain.
Acer palmatum 'Sumi nagashi'
Deep purple-red laceleaf Japanese maple.
Acer rubrum
Fast-growing shade tree with brilliant red fall color; tolerates wet soils.
Acer rufinerve
Green-and-white striped bark on young stems.
Acer spicatum
Small understory maple with upright flower spikes.
Acer tataricum
Tough, hardy small maple; drought-tolerant.
Acer oliverianum
Graceful Chinese maple similar to Japanese maple with fine autumn color.
Acer palmatum 'Hubbs Red Willow'
Red-leaved narrow willow-leaf Japanese maple. Dry seed.
Acer palmatum amoenum
Larger-leaved botanical form of Japanese maple; strong grower.
Acer palmatum 'Atrolineare'
Strap-thin red leaves that look like ribbons. Dry seed.
Acer palmatum 'Hogyoku'
Upright green Japanese maple with brilliant orange fall color. Dry seed.
Acer palmatum amoenum 'Ichigyoji'
Large-leaved green Japanese maple with vivid yellow-orange fall color. Dry seed.
Acer palmatum 'Kinran'
Red-purple laceleaf-type Japanese maple. Dry seed.
Acer palmatum 'Koto-no-ito'
Extremely narrow linear leaflets giving a 'harp strings' texture. Dry seed.
Acer palmatum amoenum 'Omato'
Big-leaved green Japanese maple selection. Dry seed.
Acer palmatum 'Osakazuki'
Prized for its intense scarlet fall color. Dry seed.
Acer palmatum 'Shojo'
Deep purple-red leaves that hold color well.
Acer palmatum 'Tsukushigata'
Dark red-purple leaved Japanese maple selection.
Acer palmatum 'Villa Taranto'
Narrow-leaved Japanese maple; pink new growth aging to green then gold.
Acer palmatum var. dissectum 'Autumn Fire'
Weeping laceleaf Japanese maple with fiery fall color.
Acer palmatum 'Beni Otake'
Long narrow burgundy leaves resembling bamboo. Dry seed.
Acer palmatum 'Burgundy Lace'
Deeply cut burgundy-purple leaves; upright habit.
Acer palmatum 'Chitoseyama'
Cascading form with deeply cut purple-red leaves. Dry seed.
Acer palmatum 'Crimson Queen'
Weeping laceleaf; deep crimson leaves all season.
Acer palmatum dissectum viridis
Green weeping laceleaf Japanese maple. Dry seed.
Acer palmatum atropurpureum 'Emperor 1'
Vigorous red-leaved upright Japanese maple; leafs out late to avoid frost.
Acer palmatum var. dissectum 'Inaba Shidare'
Weeping laceleaf that holds deep purple-red color well. Dry seed.
Acer palmatum 'Inazuma'
Cascading purple-red leaves turning crimson in fall.
Acer palmatum 'Ki hachijo'
Green Japanese maple with brilliant orange-red fall color. Dry seed.
Acer palmatum var. atropurpureum 'Nuresagi'
Very dark purple-black leaves. Dry seed.
Acer palmatum matsumurae 'O kagami'
Glossy dark red-purple leaves.
Acer palmatum 'Omurayama'
Cascading habit with lacy green leaves and gold-orange fall color. Dry seed.
Acer palmatum 'Oregon Sunset'
Compact upright red Japanese maple.
Acer palmatum 'Ornatum'
Classic bronze-red weeping laceleaf Japanese maple. Dry seed.
Acer palmatum 'Seiryu'
Only upright-growing laceleaf Japanese maple; green with orange-red fall color. Dry seed.
Acer palmatum var. dissectum 'Tamukeyama'
Weeping laceleaf holding deep burgundy through summer. Dry seed.
Acer palmatum 'Trompenburg'
Distinctive rolled-edge deep red leaves; vigorous upright form. Dry seed.
Acer palmatum atropurpureum 'Yezo Nishiki'
Red-purple leaved Japanese maple selection. Dry seed.
Acer palmatum matsumurae
Larger-lobed botanical form of Japanese maple. De-winged seed.
Acer pectinatum forrestii
Snakebark maple with striped bark and red petioles.
Acer pectinatum subsp. maximowiczii
Snakebark maple with striped green-and-white bark.
Acer platanoides
Large shade tree with dense canopy and clear yellow fall color. Available de-winged or winged.
Acer pseudosieboldianum
Cold-hardy alternative to Japanese maple with fine fall color.
Acer rubrum (Northern)
Northern-sourced red maple; hardier for cold zones. Winged seed.
Acer rubrum (Southern)
Southern/Drummond red maple; tolerates wet swampy soils. Winged seed.
Acer rubrum (Selected)
Selected superior seed source of red maple.
Acer saccharinum
Fast-growing large shade tree with deeply lobed silvery-backed leaves.
Acer saccharum (Northern, Zone 6)
Northern-source sugar maple for cold zones; classic maple syrup tree. De-winged seed.
Acer saccharum (Southern)
Southern-source sugar maple; better heat tolerance. Available de-winged or winged.
Acer saccharum ssp. leucoderme
Small southeastern US sugar maple with pale bark.
Acer shirasawanum 'Ogurayama'
Full moon maple selection with rich fall color.
Acer shirasawanum
Rounded full-moon maple with excellent fall color. Dry seed.
Acer shirasawanum var. aureum
Golden-leaved full moon maple. Dry seed.
Acer sieboldianum 'Sode-No-Uchi'
Dwarf Siebold maple selection.
Acer sieboldianum
Small Japanese maple with yellow flowers and fine fall color. Dry seed.
Acer tataricum subsp. ginnala
Hardy subspecies with brilliant scarlet fall color; often multi-stemmed.
Acer tataricum subsp. ginnala 'Flame'
Selected form with especially vivid flame-red fall color.
Acer tegmentosum
Snakebark maple with jade-green and white striped bark.
Acer tetramerum
Small Chinese maple with narrow spike-shaped leaves.
Acer triflorum
Trifoliate maple with peeling rough bark and outstanding orange-red fall color.
Acer truncatum
Tough, drought-tolerant Chinese maple with purple new growth and yellow-orange fall color.
Acer velutinum
Large Caucasian maple with velvety-hairy leaf undersides. De-winged seed.
Acer x freemanii
Hybrid of red and silver maple; fast-growing shade tree with brilliant fall color. Dry seed.
Acer x freemanii Select Varieties
Seed from select Freeman maple cultivars. De-winged seed.