Worth knowing if you want to grow parsnips:
Parsnips take time. Most varieties need at least six months from sowing till maturity. Seed can take up to a month to germinate and not every seed will germinate at the same rate.
Parsnip seed doesn’t keep. They quickly lose viability so use fresh seed no older than a year after harvest.
Parsnip seed will not germinate in cold soil. Planting too early in spring is a waste of time. Wait till the soil has warmed to a steady 10 degrees.
Parsnips taste best after frost, which converts the starches into sugars.
Parsnips need constant moisture. They are less forgiving of dry soil than most other crops.