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🔍 Click to enlargeherbbiennial💧 Hydroponic-Compatible
Parsley
Petroselinum crispum
Versatile biennial herb used in virtually every cuisine worldwide.
Quick Facts
Sun:☀️ Full Sun, ⛅ Partial Shade
Water:💧💧 Moderate
USDA Zones:Zones 3–11
Space:🪴 Container, 🌱 Small Bed, 🏡 Large Garden
Soil:Loam, Silty
Best Season(s):Spring, Fall
Experience Level:🌱 Beginner
Native Range:Central Mediterranean
Bloom Color:Small yellow-green umbels in its second year (grown for leaves)
Bloom Cycle:Second-year bloom if overwintered
Days to Harvest:50–70 days in hydro
Harvest Pattern:Continuous / cut-and-come-again
Care Notes
Slow to germinate — soak seeds overnight. Harvest outer stems first.
💧 Hydroponic Notes
Works well in Kratky and NFT. Germination is slow (2–3 weeks) — consider buying seedlings. Once established, growth accelerates significantly in hydro.
Growing Details
Mature Size:8-12 in tall, 8-10 in wide
Growth Rate:🌿 Moderate
Zone Performance
As a true biennial, parsley's zone performance is defined by whether it survives winter to flower in year two: in Zone 3-5 the crown is usually killed by deep freezes, so it behaves as an annual, while in Zone 6 and warmer a heavy mulch typically lets the root overwinter successfully, allowing gardeners there to save seed or leave it as a pollinator plant in its second spring.
Companions & Wildlife
🦌 Deer Resistance
occasionally damaged
Parsley is more palatable to deer than most culinary herbs and can be browsed, especially when preferred forage is scarce.
🐝 Pollinator Value
high
If overwintered into its second year, parsley's flat-topped yellow-green umbels attract hoverflies, parasitic wasps, and are a favored host plant for black swallowtail butterfly caterpillars.
Good Companions
Tomato — Parsley left to flower in its second year attracts hoverflies and parasitic wasps that prey on tomato hornworms and aphids.
Asparagus — A long-standing traditional pairing; parsley's shallow roots don't compete with asparagus crowns and the two share similar moisture needs.
Carrot — Both are members of the same Apiaceae family with similar cultural needs, making shared bed planning straightforward, though rotating them separately helps avoid shared pests.
Corn — Parsley's low, dense habit makes efficient use of ground space beneath taller corn without competing for light.
Troubleshooting
⚠️ Slow, erratic germination taking 3-4 weeks
Soak seed overnight in warm water before sowing and keep the seedbed consistently moist until sprouts emerge.
⚠️ Parsleyworm (black swallowtail caterpillar) stripping foliage
Tolerate light feeding since it supports butterfly populations, or relocate caterpillars to a dedicated sacrificial plant if damage is heavy.
⚠️ Premature bolting in a hot first summer
Provide afternoon shade during heat waves and keep soil evenly moist, since heat and drought stress trigger early flowering.
⚠️ Carrot rust fly larvae tunneling in the taproot
Cover new plantings with floating row cover to exclude egg-laying flies, since parsley shares this pest with its Apiaceae relatives.
✅ Pet Safety
Non-toxic to cats and dogs in small culinary amounts; large quantities of the essential-oil-rich variety are not recommended for pregnant animals.
Informational only — always check with a veterinarian if you suspect your pet has eaten something it shouldn't have.
🌿 Traditional & Medicinal Use
A well-documented dietary source of vitamin K — food value, not a medicinal preparation.
Informational only, not medical advice — consult a healthcare provider before using any plant medicinally.