Parsnip canker has no chemical control. It shows as a reddish-brown to blackish rot across the shoulder and crownThe base of a perennial plant where roots and shoots meet, often sold and planted as a ready-made dormant plant rather than grown from seed. Full definition → of the root, and once it's there, all you can do is cut the damaged part away or lose the root. That's why variety choice matters so much for parsnips: a resistant variety is the one defence you can build in before you sow.
Quick answer
Gladiator is the best all-round choice: canker-resistant, quick to mature and happy in most soils. Albion and Picador are equally sound canker-resistant alternatives. Grow Pearl for winter storage and Viper for size, but don't rely on either against canker.
The five AGM varieties compared
The RHS recommends five parsnips with its Award of Garden Merit (AGMThe RHS's Award of Garden Merit: a UK-wide trials award for reliable performance, not a Scotland-specific recommendation. Full definition →), a UK-wide award rather than a Scottish one: Albion, Gladiator, Pearl, Picador and Viper. All five are rated H5The RHS's H1a–H7 scale for how much cold a plant can survive outdoors, H1a being tender indoor-only and H7 hardy anywhere in the UK. Full definition →, hardy throughout the UK even in a severe winter, so hardiness doesn't separate them. Canker resistance does.
| Variety | Canker resistance | Roots | Best for |
|---|---|---|---|
| Gladiator | Yes | Long, slender, pale cream, smooth skin; rich, sweet and earthy | An all-round, early-maturing choice for most soils |
| Albion | Yes, bred for it | Long, smooth and evenly tapered; white skin slow to discolour; sweet | A second canker-resistant variety |
| Picador | Yes | Long, tapering, white; very vigorousHow much a fruit tree's rootstock limits or allows its eventual size, from extremely dwarfing (smallest) through to very vigorous (largest). Full definition → | A second canker-resistant variety |
| Pearl | Uncertain | Long, slender, smooth white skin | Storing in the ground over winter |
| Viper | No, may be susceptible | Long and uniform, shallow crown; F1The first-generation offspring of two specific, deliberately chosen parent plants, bred for a predictable, uniform result but not worth saving seed from. Full definition → that can grow very large | Exhibiting |
Gladiator is quick to mature and can give a crop very early in the season, which helps where the growing season is short. It grows well in most soils, and Gardeners' World describes it as especially suited to heavy ones.
Albion and Picador are just as dependable against canker. Growing two of the three canker-resistant varieties spreads the risk if one has a poor year.
Pearl stores well in the ground over winter. It's sometimes described as canker-resistant but is also listed as possibly susceptible, so if canker is the problem you're trying to solve, choose one of the three above instead.
Viper is bred to grow large roots for showing, not to fight disease, and may be susceptible to canker. It's an F1 hybrid, so seed saved from it won't come true. Give it the extra root care described below.
What Scotland means for the choice
Parsnips germinateA seed sprouting: breaking dormancy and putting out its first root and shoot, given the right warmth and moisture. Full definition → poorly until the soil reaches about 12°C, so on colder Scottish ground sowing often starts late, and a quick-maturing variety like Gladiator helps make up the time. All five are fully hardy, so any of them can stand in the ground through a Scottish winter and be lifted as needed. Canker gets in through damaged roots, so a resistant variety works best alongside hand-weeding rather than hoeing, even watering and mesh against carrot fly; the parsnip canker page has the full list. Our parsnip growing guide covers sowing, soil and harvesting.
Other varieties worth trying
White Gem is a reliable, sweet-flavoured variety with some canker resistance, though it isn't an AGM variety.
Archer gives good yields and flavour and is also a canker-resistant variety. Gardeners' World lists it as an AGM variety, but the RHS list does not, so treat its status as unclear. Parsnip seed loses viability quickly, so buy fresh seed each year.
Common questions
Is Gladiator really better than Albion or Picador?
All three are canker-resistant AGM varieties, so there's little between them for reliability. Gladiator's edge is that it matures quickly and copes with a wide range of soils, including heavy ones (Gardeners' World). Growing two of the three is a sensible way to spread the risk in a poor year.
Should I avoid Pearl and Viper?
Only if canker is your main problem. Pearl stores well in the ground over winter, and Viper grows very large roots for showing, but neither is a dependable choice against canker.
Does Scotland's rain make parsnip canker worse?
There's no evidence that rain itself causes it. Canker gets into roots that are already damaged, and badly drained, compacted ground raises the risk, so on wet ground, good drainage matters.
Sources
Show the 8 sources
- How to grow Parsnips: The five recommended AGM varieties, Albion and Picador as canker-resistant, germination around 12°C, hand-weeding rather than hoeing, even watering, canker on damaged roots, mesh against carrot fly
- Pastinaca sativa 'Albion': Canker resistance, hardiness, root description
- Pastinaca sativa 'Gladiator': Canker resistance, hardiness, soil pH 6.5–7, quick to mature, grows well in most soils, root description
- Pastinaca sativa 'Pearl': Stores well in the ground; described as canker-resistant but also listed as possibly susceptible; hardiness, root description
- Pastinaca sativa 'Picador': Canker resistance, vigour, hardiness, root description
- Pastinaca sativa 'Viper': Possible canker susceptibility, F1, large roots for exhibiting, hardiness
- Pastinaca sativa 'White Gem': Some canker resistance, soil pH
- How to Grow Parsnips: White Gem and Archer, Gladiator for heavy soils