whitebeam

Photo: Julie Anne Workman — CC BY-SA 3.0 · source

Survives zone 5 through 8

Harvest calendar

Best planted in early spring after your last frost, or in fall before the ground freezes, depending on your climate.

Whitebeam produces mealy, dry-textured berries that are inedible fresh off the tree — they are traditionally left to blett, softening in storage until almost overripe, at which point old foraging accounts describe the flavor as surprisingly rich and fruity; the berries can also be dried and ground into a meal mixed with cereal flour. ⚠ Not just astringent: raw fruit in this group contains parasorbic acid, which causes vomiting, stomach cramps and diarrhoea if you eat any quantity of it. Cooking, freezing, drying or a hard frost converts it to harmless sorbic acid — which is exactly why every traditional recipe cooks it and why the fruit is picked after the first frosts.

Hardiness

Zone 5–8

Habit

Tree

Edible part

Fruit

Ripens

Summer–autumn

Mature size

Tree 8–15 m with a dense rounded crown

Light

Full sun to partial

Soil pH

6.0–7.0 (near-neutral)

Environment

Montane

Native range

Central, Southern and Western Europe — from Britain and France to Spain, and east to Macedonia and Transylvania — together with North Africa (Algeria, Morocco, Tunisia) and pockets of the eastern Mediterranean and Caucasus (Turkey, Armenia, Georgia). It is strongly associated with dry limestone and chalk hillsides.

Status

Both wild and cultivated

Years to fruit

2–4 yrs

Growth speed

Medium growth rate, reaching roughly 8-12 m tall with a 4-8 m spread over 20-50 years.

Spacing

700 cm (276 in) apart — about 49 m² (527 sq ft) per plant

Leaf shape

Simple, undivided, broadly ovate leaves with toothed margins — unlike most other Sorbus, whitebeam does not have compound leaves — with a distinctive dense white-felted (tomentose) underside that gives the species its common name.

Root system

A branching 'heart root', with several primary roots radiating from the crown down and outward rather than one central taproot.

Fruit description

Rounded pomes about 10-12 mm across, orange-red to scarlet, with a dry, mealy texture rather than juicy flesh. They are unpalatable raw when fresh — dry and astringent — and are traditionally bletted (stored in a cool, dry place until almost, but not quite, going soft and overripe), at which stage the flavor is described as rich and tropical-fruit-like; alternatively the berries are dried and ground into a flour-like meal.

Propagation

By seed — sow fresh in a cold frame as soon as ripe, or give stored seed 2 weeks warm followed by 14-16 weeks cold stratification; germination can be slow and seedlings are very slow to put on top growth in their first year or two while establishing their root system, so seedlings are usually kept in pots over their first winter before spring planting out. Ornamental cultivars such as 'Lutescens' and 'Majestica' are propagated by grafting.

Pollination

Largely self-incompatible — unlike the fully self-fertile rowan (S. aucuparia), common whitebeam typically needs cross-pollination from a genetically distinct tree to set a good crop of fruit; flowers are visited by bees and other insects.

The edible parts listed above are a starting point, not a field guide. Identify a plant with certainty — ideally against a local authority — before eating any part of it, and read the full disclaimer. Spotted something wrong? Report it.