Parsnip · Barking, England, United Kingdom
When to plant parsnips in Barking
Main outdoor window
31 Mar - 21 Apr
The window this page is built around.
Timed from last spring frost
14 April
In Barking, on your chosen risk.
Ready to pick
9 Jul - 8 Aug
If you plant at the start of the window.
The average last frost. Half of all years are later than this.
Step by step in Barking
Each window is a range, not a single day. Earlier in the range buys you a longer season; later in it buys you a safer one.
Sow direct
31 Mar - 21 Apr
Two weeks before your last frost.
Harvest
9 Jul - 8 Aug
Parsnips through the year
Against the frost risk in Barking
Why these dates
Sow fresh seed - parsnip seed loses viability within a year. Germination takes up to four weeks, so sow into a weed-free bed you can leave alone.
Deliberately harvested after frost, which converts starch to sugar. Roots survive -15C in the ground and can be lifted all winter.
Seed packets and extension guides express timing as weeks either side of the last spring frost, because that is the only reference point that travels. Parsnips are timed for direct sowing 2 weeks before it, and this page simply resolves those offsets against the frost date computed for Barking.
The median frost-free season here is 219 days, against 100 to 130 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Barking
Other vegetables to time
Growing parsnips in Barking
When should I plant parsnips in Barking?
Aim for 31 Mar - 21 Apr in an average year. If you would rather not gamble on the weather, wait until 21 Apr - 12 May - by then frost has finished in nine years out of ten.
When will parsnips be ready to harvest in Barking?
Expect to start picking around 9 Jul - 8 Aug, based on 100 to 130 days to maturity from the planting date calculated for this location.
How much frost will parsnips tolerate?
Deliberately harvested after frost, which converts starch to sugar. Roots survive -15C in the ground and can be lifted all winter.