Flat Leaf Parsley

Parsley

70d to harvest

Aromatic, flat, and beautifully lacy—Italian Flat Leaf Parsley brings a vivid green fragrance that rises the moment you brush its leaves. The foliage is tender and finely textured, with broad, true flat blades that stay attractive through the season for steady harvests. Ideal for fresh garnishing and flavoring, it shines in herb-forward sauces, bright salads, and pickling blends where its clean, classic parsley character is front and center.

Crop Dates

Growing note: In frost-free Zone 10a, 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	Rosette
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	45
Min Night Temp (°F)	35
Harden Off (days)	7

Frequently Asked Questions

What is the most common disease issue for flat-leaf parsley (Petroselinum crispum var. neapolitanum) and how do I control it?

A frequent problem is Septoria leaf spot, which shows as small, dark spots that expand and yellow the leaves. Remove and discard infected foliage, improve airflow around plants, and avoid wetting the leaves when watering. If it keeps spreading, treat with a labeled copper-based fungicide and repeat as directed on the label, starting at the first signs.

How often should I water flat-leaf parsley during the main growing phase?

Keep the top 1–2 inches of soil consistently moist but not soggy, especially through the 60–70 days leading to harvest. Water when the surface begins to dry, typically about 1–2 times per week depending on heat and soil texture, and ensure good drainage to prevent root stress. Parsley in consistently wet soil is more prone to leaf spotting and slow growth.

How can I tell when flat-leaf parsley is ready to harvest (about 70 days)?

Harvest when plants have reached a full rosette and leaves are sturdy enough to cut without tearing—typically around day 70. Pick outer stems first, cutting near the base and leaving the inner growth to continue producing. If leaves are pale and sparse, wait a bit longer; harvest should be vigorous once the plant forms dense, flat leaves.