Parsley

Petroselinum crispum

Biennial culinary umbellifer grown for its leaves in the first year. Allow some plants to run to flower in the second year for parasitic wasps and butterfly larvae.

Hardiness ratings

Parsley hardiness across the four zone systems
SystemRatingTemperature rangeHow to read it
USDA hardiness zone Zone 4–9 −34.4 °C to −1.1 °C Plant tolerates down to this zone
RHS hardiness rating H5 −15 °C to −10 °C Plant needs at least this level of cold tolerance
Canadian plant hardiness zone Zone 4–8 −29 °C to −1 °C Plant tolerates down to this zone
Australian (ANBG) zone Zone 1–6 −15 °C to 15 °C Plant tolerates down to this zone

About Parsley

Parsley is a biennial grown as an annual: it makes leaves in its first year, then flowers, sets seed and dies in its second, which is why a productive plant seems to give up abruptly the following spring. It comes in flat-leaved and curled forms, the flat-leaved generally considered stronger in flavour. The roots are long and taproot-like, so it resents being transplanted once established. Its seed is famously slow and erratic to germinate, a trait that produced a whole body of folklore about the seed travelling to the underworld and back before sprouting.

Growing notes

  • Larval food plant for swallowtail butterfly caterpillars in its second-year flowering form
  • Slow to germinate — 3 to 4 weeks is normal, do not give up too soon
  • Flat-leaf and curly-leaf are the same species, just different cultivar groups — flat-leaf has more flavour, curly-leaf has more visual presence as a garnish

Categories

Related plants

Cross-check Parsley against your zones

Reference

Parsley on Wikipedia