Italian Flat Leaf

Parsley

70d to harvest

Fragrant, vividly green fronds unfurl with a crisp, clean snap and a distinctly bright, herbal perfume that lingers on the palate. Italian Flat Leaf parsley forms an upright, lush rosette of broad, flat leaves with a tender texture that stays flavorful through the season, making it a favorite for fresh garnishing and bold, aromatic flavor-building in sauces. Grow it for its reliable, garden-ready productivity and its unmistakably flat-leaf look—an elegant staple that elevates every harvest basket.

Crop Dates

Growing note: In frost-free Zone 12a, grow this cool-season crop during the cooler dry season (October–February).

Milestone	Date
Start Indoors	—
Climate	Frost-Free Climate
Transplant / Sow Outdoors	Oct 1st
Harvest Begins	Dec 10th
Harvest Ends	Feb 28th

Crop Details

Trait	Value
Days to Maturity	70
Sun Requirements	Part Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	50
Min Night Temp (°F)	50
Harden Off (days)	7

Frequently Asked Questions

What pest or disease commonly affects Petroselinum crispum (Italian flat-leaf parsley), and how can I control it at home?

Italian flat-leaf parsley (Petroselinum crispum var. neapolitanum) is commonly hit by leaf spot, often showing as brown/black spots with yellowing around them. Remove and discard spotted leaves, avoid wetting the foliage when watering, and improve airflow by thinning or spacing plants so leaves dry quickly after watering. If you’ve had repeat outbreaks, treat early with a labeled copper-based fungicide and keep harvesting leaves regularly to reduce dense growth.

How often should I water Italian flat-leaf parsley during peak growth, and what soil moisture level should I aim for?

During the main growth period, keep the top 1–2 inches of soil consistently lightly moist—parsley prefers even moisture rather than drying out and then flooding. Water about 1–2 times per week depending on weather, increasing frequency during hot, windy spells, but never let the soil stay soggy. The best check is to water when the surface begins to dry; after watering, you should see moisture penetrate but not pool.

How can I tell when Italian flat-leaf parsley is ready to harvest?

Harvest starts around 70 days from sowing when plants form a full rosette and the outer leaves are large enough to pinch or cut. Pick the outer leaves first (or cut the whole plant near the base once it’s well-established), leaving the inner crown to regrow. Stop major harvest once plants bolt with flowering stalks, but you can still take small leaf cuts before the flavor becomes harsher.