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Quercus palustris Early Drop Form (EDF)

Pin Oak

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EDF is a form of pin oak (Quercus palustris) sold for one difference: its leaves fall early in autumn, where the straight species holds its dead brown leaves into winter. Lists expand EDF as early drop form, two growers' sheets as early defoliating form, and those two also name it Freefall. It is a large tree, about 15 to 20 m tall and 7 to 15 m wide on three of four sheets, with red-brown to scarlet autumn colour.
Illustration of pin oak (Quercus palustris): a shoot tip with alternate, glossy green leaves, each deeply cut into five to nine pointed, bristle-tipped lobes with deep U-shaped sinuses reaching close to the midrib, and two small rounded acorns each sitting in a thin, flat, saucer-like cup
Pin oak (Quercus palustris), a shoot tip
Type
Deciduous tree
Height
15 m to 20 m
Spread
7 m to 15 m
Growth
Fast
Flowers
Yellow-green, spring
Sun
Full sun to light shade
Drought
High
Frost
High frost tolerance
In Australia
Naturalised

Growing pin oak early defoliating form

What differs. The ACT Government's sheet for 'Free Fall', the name those two growers also give this form, says its leaves drop quickly in autumn, unlike the widely planted species. One grower says it drops its autumn leaves far sooner than the ordinary pin oak, which keeps them well into winter; a Victorian tree grower's sheet for 'Free Fall' says it keeps fewer brown leaves. Otherwise the sheets describe a pin oak.

Growing. The ACT sheet for 'Free Fall' rates its frost and drought tolerance high, finds it does well in a wide range of soil types whatever the drainage, and calls it long lived; it says the tree establishes well and is fast growing, and one grower calls its growth average to fast. The ACT sheet says it requires formative pruning when young and removal of the lower branches as it matures; that grower says no pruning is required, and gives its climate as warm temperate to cold.

Sun and soil. The Victorian sheet for 'Free Fall' prefers full sun and acid, well-drained, moist soil but says it will handle most soils from dry to wet; an EDF sheet prefers full sun and well-drained, acid soil; a third grower marks it for full or part sun and adaptable soil. The first two say it tolerates periods of drought.

Using pin oak early defoliating form

The ACT sheet for 'Free Fall' suits it to large landscapes such as parks, wide street verges and school or commercial grounds, for its dense summer shade, calls it a useful large tree near playgrounds, and points to plantings at two arboretums in the ACT. Growers' sheets give it for shade, parkland, avenues and large gardens. The ACT Government's sheet for the species suits that tree to places where winter sun is not an issue; its sheet for 'Free Fall' carries no such line. No sheet read says how much earlier the leaves fall.

What to check before you buy

Growers list this form as Early Drop Form (EDF) or 'Early Drop Form'. Two growers' sheets name EDF as Freefall, and the HortOS catalogue also lists Freefall under its own name: check which one each quote is for. The International Oak Society's checklist gives Quercus palustris 'Free Fall' as an accepted but unpublished name from the Waite Arboretum in Australia; no reference read says more about who selected it. The table above shows the sizes growers list, and the guide to specifying and procuring trees covers the stock standard for street planting. Stock moving between states travels under the state and territory biosecurity rules.

Cautions

The ASPCA lists oak (Quercus species) as toxic to horses, naming gallotannin as the toxic principle.

Western Australia's organism list gives Quercus palustris the legal status Permitted (s11) for the whole of the state, with no control category assigned for any local government area; permitted organisms must satisfy any import requirements that apply. (Western Australian Organism List (Department of Primary Industries and Regional Development))

Used forshadestreet and avenuespecimen

Prices are set by each grower and shown ex GST. Availability is confirmed by the grower at order.

Common questions

What does EDF mean on a pin oak?
Early drop form on growers' lists and early defoliating form on two growers' sheets. Both name a pin oak whose leaves fall early in autumn instead of hanging on into winter.
Is EDF the same as Freefall pin oak?
Two growers' sheets name it Freefall EDF, and the ACT Government and a Victorian tree grower describe a pin oak 'Free Fall' that drops its leaves early in the same way.
How big does EDF pin oak grow?
About 15 to 20 m tall and 7 to 15 m wide on three of the four sheets: 18 m by 15 m on the ACT sheet for 'Free Fall', 15 m by 8 m on a Victorian tree grower's sheet for 'Free Fall' and 20 m by 7 m on another grower's. The fourth, an EDF sheet, gives up to 30 m tall and 20 m wide, out of line with the other three, though the Missouri Plant Finder gives the species less often about 30 m.
Does EDF have the same autumn colour as pin oak?
Much the same: red-brown on the ACT sheet for 'Free Fall' and scarlet or bronze-scarlet on growers' sheets, against rust-red on the ACT sheet for the species.

Sources

  • GBIF species match API (the species name and family)
  • ASPCA Animal Poison Control, Toxic and Non-Toxic Plants: Oak (Quercus species)
  • ACT Government, Transport Canberra and City Services: Design Standards for Urban Infrastructure, Plant Species for Urban Landscape Projects in Canberra, Quercus palustris 'Free Fall' (written for 'Free Fall', the name two growers also give EDF)
  • ACT Government, Transport Canberra and City Services: Plant Species for Urban Landscape Projects in Canberra, Quercus palustris (the species sheet)
  • A tree grower's published description: Quercus palustris FreeFall, the early defoliating or Freefall pin oak, EDF (the grower's own claims)
  • A grower's product detail sheet (PDF): Quercus palustris freefall EDF, Pin Oak Early Defoliating Form (the grower's own claims), with the grower's plant page
  • A Victorian wholesale tree grower's fact sheet: Quercus palustris 'Free Fall', pin oak tree (early defoliating) (the grower's own claims)
  • Missouri Botanical Garden Plant Finder: Quercus palustris (the species page)
  • International Oak Society, Oak Names Checklist: Quercus palustris 'Free Fall' (accepted, unpublished; from the Waite Arboretum, Australia)
  • The HortOS catalogue (the names growers list it under, and the Freefall row listed beside it)
  • The HortOS guide to specifying and procuring trees

The growers, sizes and prices above are live and change as lists arrive. Cite this page: HortOS, Pin oak early defoliating form (Quercus palustris), https://au.hortosapp.com/plants/quercus-palustris-early-drop-edf.

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