How to Grow Burdock (Gobo) UK

When to Plant Burdock (Gobo) in the UK

When to plant burdock (gobo) in the UK: in Southern England, sow early June to early July. Find your area in the table below.

Region	Sow
Southern England	early June to early July
Midlands	early June to early July
Northern England	early June to early July
Scotland	early June to early July

Southern England - detail & sources

NC State Extension recommends sowing cultivated gobo from seed in summer for first-year root harvest by late autumn; a single early-summer window is applied uniformly across all four sub-regions since neither source gives a UK-region-specific gradient.

Midlands - detail & sources

NC State Extension recommends sowing cultivated gobo from seed in summer for first-year root harvest by late autumn; a single early-summer window is applied uniformly across all four sub-regions since neither source gives a UK-region-specific gradient.

Northern England - detail & sources

NC State Extension recommends sowing cultivated gobo from seed in summer for first-year root harvest by late autumn; a single early-summer window is applied uniformly across all four sub-regions since neither source gives a UK-region-specific gradient.

Scotland - detail & sources

NC State Extension recommends sowing cultivated gobo from seed in summer for first-year root harvest by late autumn; a single early-summer window is applied uniformly across all four sub-regions since neither source gives a UK-region-specific gradient.

Quick Facts

Factor	Value
Soil texture	clay, loam or sand (RHS)
Drainage	well-drained
Lifecycle	biennial
Edible parts	roots

At a Glance

Soil & Growing Conditions

Water: moist but well-drained (RHS)

Growth Stages

Stage	BBCH	Notes
Sowing	0	Sow seed in autumn or early spring, pre-soaked or scarified to improve germination, or sow in a tray and transplant before the tap-root develops (RHS).
Taproot development	3	Develops a long, deep taproot alongside large downy foliage; cultivated gobo is spaced 50-60cm apart (NC State Extension).
First-year root harvest	8	First-year roots are harvested by late autumn before they become too fibrous (RHS; NC State Extension).
Second-year flowering	6	In its second year, unharvested plants produce purplish thistle-like flowerheads followed by characteristic brown burr seedheads (RHS).

Harvest & Storage

When to pick: Harvest the long first-year taproot by late autumn, before it becomes too fibrous; sown from seed in summer with plants spaced 50-60cm (about 2ft) apart (RHS; NC State Extension).

Diseases

Powdery mildew

low

NC State Extension: occasional powdery mildew.

Pests

Aphids

low

Aphididae (various spp.)

NC State Extension: occasional aphids.

Burdock (Gobo), Grown for Its Long Taproot

Purplish thistle-like flowerheads

RHS: an erect, branching plant with purplish flowerheads clustered on leafy branches, followed by characteristic brown burr seedheads.

Large, downy foliage

RHS: large downy dull-green foliage typical of this robust, tap-rooted biennial.

The origin of Velcro

Burdock's hooked burrs famously inspired the invention of Velcro, after the seedheads were found clinging to clothing and fur.

Grown for its taproot, gobo

RHS: grown in cultivation for its long first-year taproot, known as gobo, harvested by late autumn before it becomes too fibrous.

A bushy biennial, 1.5-2.5m tall

RHS: reaches 1.5-2.5m in height with a 1-1.5m spread, taking 1-2 years to reach maturity with a bushy habit.

What the research guides add

Burdock is grown as a root vegetable in Asia, and NC State is blunt about its other side: it is a weed.

• A biennial: the first year forms a short, dense rosette of leaves; in its second year it bolts to 2 to 10 feet and its tap roots grow to depths of 3 feet. (NC State Extension)
• It prefers full sun and moist, well-drained soil rich in organic matter and nitrogen. (NC State Extension)
• In Asia it is cultivated for its edible roots. Cultivated plants are sown from seed in summer and the first-year roots are harvested by late autumn, before they become too fibrous. (NC State Extension)
• It can become invasive and is extremely difficult to eradicate because of its deep tap roots and the long-lived seed; the burs are very hard to remove from fur and clothing. (NC State Extension)

Sources for this section

• NC State Extension: Arctium lappa (Plant Toolbox)

Section researched and checked on 25 October 2026 by the SoilCommander Editorial Team. How we check facts: editorial policy.

References

1. NC State Extension - Gobo - Arctium lappa

   Cultivated gobo/burdock is sown from seed in summer, with first-year roots harvested by late autumn before they become too fibrous; plants are spaced 50-60cm (about 2ft) apart. Occasional pest and disease problems include aphids and powdery mildew, though the plant is relatively pest- and disease-resistant overall. In Japan, notable pests include Tebenna issikii and thrips, and root-feeding weevils such as Pantomorus cervinus; notable diseases include powdery mildew and various root rots.

2. Plants For A Future (PFAF) - Arctium lappa

   PFAF entry for Arctium lappa. Fetched and parsed directly for the USDA hardiness rating.

3. Royal Horticultural Society - Arctium lappa | greater burdock

   An erect, branching, robust tap-rooted biennial with large downy dull-green foliage and purplish thistle-like flowerheads clustered on leafy branches, followed by characteristic brown seedheads (burrs). Native to Eurasia, including Great Britain and Ireland. Hardiness H4 (hardy through most of the UK, -10 to -5°C). Full sun or partial shade. Soil: clay, loam or sand; moist but well-drained; acid, alkaline or neutral pH; east-, south- or west-facing, sheltered. Height 1.5-2.5m, spread 1-1.5m. Biennial, time to maturity 1-2 years, bushy habit. Propagated by seed sown in autumn or early spring, pre-soaked or scarified to improve germination; alternatively sown in a tray and transplanted before the tap-root develops. Generally pest-free and generally disease-free. Grown in cultivation for its long, edible first-year taproot -- known as gobo -- harvested by late autumn before it becomes too fibrous.

3 independent sources are cited for this crop. Where they disagree - soil pH is the clearest case - every figure is preserved rather than averaged into false precision.