When to Plant Parsley in Maine (2026 Guide)

If you're looking to cultivate parsley in Maine, you're making a great choice! This popular herb is renowned for its versatility in culinary applications, growing ideally in the state's humid climate. Maine's gardening potential can be maximized by understanding the right planting times, particularly in regard to annual frost dates—like the median last spring frost on May 8 in Zone 5b.

Parsley, a biennial herb, is traditionally grown as an annual, providing lush, aromatic leaves in its first year. When planted in your garden, it not only enhances your meals but also attracts beneficial insects that aid in pest management. In areas such as Portland, it's essential to note that May 8 marks the last chance of spring frost, making it a critical date for planting.

In addition to its culinary benefits, parsley is easy to cultivate in containers. Whether you're tending to a garden plot in Augusta or a balcony in Bangor, start your parsley plants indoors if necessary, as they can thrive both outdoors and inside. Timing your planting around the last frost dates, especially the shift between April 27 and May 8, can significantly improve your harvest yield.

Planting Schedule by USDA Zone in Maine

Zone	Indoor start	Transplant out	Direct sow	Harvest
Zone 5b	Start March 15 – March 31, ~6–8 weeks before May 8	Transplant outdoors after May 8	Direct sow from May 15 to June 15	Harvest from June 1 to October 5
Zone 6a	Start March 1 – March 15, ~6–8 weeks before April 27	Transplant outdoors after April 27	Direct sow from May 1 to June 1	Harvest from June 1 to October 8

Parsley Planting Windows in Maine

Indoor start: Start parsley seeds indoors from March 1 to March 31 for the best results.
Transplant outdoors: Transplant your parsley seedlings outdoors in Maine after May 8 to avoid frost damage.
Harvest: Harvest can begin as early as June 1 and can be continued through October 5 before frost sets in.

Common Mistakes Growing Parsley in Maine

Many gardeners in Maine may plant too early, risking frost damage to tender parsley seedlings. Be sure to wait until after May 8 to transplant outdoors, as late spring frosts can occur unexpectedly.
Overwatering is a common issue in the humid summers of Maine. While parsley thrives in moist soil, excess water can lead to root rot, so be cautious especially in the cooler, damp coastal regions.
In Maine's clay-heavy soil areas, proper drainage is key. Parsley requires well-drained soil, so consider amending your garden mix with compost or perlite to improve drainage for better root health.
Coastal fog can hinder parsley's growth by reducing sunlight exposure. If you're gardening in coastal Maine, consider placing your pots or garden beds in sunnier spots to optimize growth and quality.
Some Maine gardeners may overlook the importance of succession planting. By staggering your plantings throughout the growing season, you can ensure a continuous supply of parsley without the risk of bolting that occurs in the second year.

Frequently Asked Questions

What if I'm in a cold pocket of Maine?

If you're located in a colder pocket of Maine, like northern areas, consider starting your parsley indoors earlier and transplanting outside only after the last frost. Keep an eye on soil temperatures and local frost forecasts to avoid risks.

Can I still plant parsley in May?

Yes, planting parsley in May is possible if you're in Zone 5b, but make sure to wait until after May 8 to avoid damage from lingering frost. Planting after this date can lead to a healthy harvest.

How long does parsley take to grow?

Parsley typically takes about 70 to 90 days from planting until you enjoy the first harvest. Depending on when you sow the seeds and your growing conditions in Maine, this timeline can vary slightly.

Can I grow parsley in containers?

Absolutely! Growing parsley in containers is an excellent choice, especially for patios and balconies. Just ensure you have a 10–12 inch pot with good drainage and place it where it can enjoy ample sunlight.

How often should I water my parsley?

Parsley prefers consistent moisture in the soil but not sogginess. Water it thoroughly once the top inch of soil feels dry. In the humid climate of Maine, adjust your watering frequency accordingly to avoid overwatering.