Growing Parsley: A Complete Profile
By Growing Home Greens Team · July 18, 2026
Parsley is technically a biennial, not an annual, though most gardeners never see the second year. It’s usually grown and harvested in its first season, then replaced the following spring rather than left to bolt and flower in year two.
Slow to germinate, not a sign of failure
Parsley can be started indoors or direct-sown, either about 8 weeks before your last frost indoors or a couple weeks before it outdoors. Germination is notoriously slow, two to three weeks is normal, not a sign of failure. In its first year it forms a leafy rosette that’s ready to harvest continuously; if left in the ground over winter in a mild enough zone, it will bolt and flower the following spring as its biennial nature intended, at which point the leaves turn bitter and it’s done for cooking.
Bitter leaves mean it’s already bolted
Bitter-tasting leaves usually mean the plant has bolted into its second-year flowering stage, at that point, pull it and start a fresh batch rather than trying to revive it. Slow or spotty germination is normal for parsley; presoaking seed overnight can speed things up slightly, but patience is still the main requirement.
A tomato companion that tucks in anywhere
Parsley is a classic tomato companion, prized for attracting beneficial insects nearby. See the full companion guide for parsley. At 4 plants per square foot, it’s dense enough to tuck around larger crops in the Garden Designer without needing its own dedicated bed space.
Companion planting guide for Parsley · Find your planting dates
Typically viable in USDA zones 3-10. Not sure your zone? Look it up by ZIP code.
Method: Either: Start indoors for an earlier harvest, or direct-sow outside for less fuss. Parsley tolerates either.
See exact start-indoors, direct-sow, and harvest dates for your zone →
How many Parsley plants fit per square foot?
Spacing: 4 per square foot (square-foot-gardening spacing). Mature height: 0.5-1 ft.
Varieties worth considering
- Gigante d'Italia (Giant of Italy): The most-reviewed top variety in Cornell's Vegetable Varieties for Gardeners database (4.5 stars, 20 reviews), a flat-leaf Italian type with large, dark green leaves at 70-75 days, closely matching the flavor most cooks want from parsley. (source)
- Dark Green Italian: Cornell's database rates it even higher than Gigante d'Italia at 4.8 stars, another flat-leaf type at 78 days. The two are close enough that either is a safe choice if you want flavor over garnish looks. (source)
- Moss Curled: The curly-leaf type most people picture as a garnish, rated 4.4 stars in Cornell's database with compact plants and finely cut leaves. Milder and less useful for cooking than the flat-leaf types above, but the one to grow if you specifically want the traditional curly look. (source)
Cited from the source shown next to each variety. We haven't grown these ourselves yet, so treat this as a research-backed starting point, not a personal endorsement.
Where to buy parsley seeds
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See it growing
Search YouTube for "growing parsley" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
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Growing Parsley: A biennial herb most gardeners grow as an annual: flat-leaf for flavor, curly for looks, and both slower to start than you'd expect.
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