Parsley flowers naturally as it reaches the end of its life cycle, usually in its second year. If you let it bloom, you can enjoy its small, pollinator-friendly flower clusters and collect seed for future plants. First decide whether you want flowers and seeds or a longer harvest of leaves: flowering uses the plant’s energy, and the leaves often become less tender and flavorful afterward.
What You’ll Need
- A healthy, established parsley plant, ideally one that has overwintered
- A sunny or partly sunny garden spot, or a large container with drainage
- Water and, if growing in a pot, a watering can
- Optional: a stake and soft plant ties for tall flower stems
- Optional: a paper bag or shallow tray for collecting ripe seeds
Step-by-Step
- Confirm the plant is ready to flower. Parsley is generally biennial: it grows leafy foliage in its first season, then commonly sends up flower stalks in its second season after experiencing winter cold. Timing varies with climate and growing conditions. A plant that is bolting in its first year may be reacting to heat, drought, crowding, or another stress; it can still flower, but the change may be premature.
- Choose whether to keep the flowers. To support blooms and seed, stop harvesting most of the leaves and leave the central growth intact. If your priority is a continuing supply of tender leaves, cut flower stalks as soon as they appear. You can also let one plant flower while keeping others leafy.
- Pick a suitable position. Keep the plant where it receives full sun to partial shade. In hot weather, some afternoon shade helps reduce stress. Parsley grows in fertile, well-drained soil; in a container, use a pot with drainage holes and quality potting mix. Avoid moving an established plant unnecessarily, since transplanting can set it back.
- Water consistently. Check the soil regularly and water when the surface begins to dry. Water deeply enough to moisten the root area, then let excess drain away. Do not leave a pot standing in water. Even moisture helps the plant develop, but soggy soil can damage roots and does not encourage healthy flowering.
- Allow the flower stalks to develop. Parsley sends up branching stems topped with flat clusters of tiny yellow-green flowers. Leave the stems in place. If they lean or become top-heavy, loosely tie them to a stake without constricting the stems. Avoid applying a heavy dose of fertilizer; excessive feeding, especially with nitrogen, can favor leafy growth over sturdy flowering.
- Leave flowers for pollinators. The flowers attract small beneficial insects, including hoverflies and bees. Avoid spraying insecticides on open blooms. If you need to manage pests, identify the problem first and use the least disruptive suitable method, following the product label.
- Wait for seeds to mature if you want to save them. After flowering, the clusters form small, green seeds that gradually turn brown or tan as they ripen. Let them dry on the plant while watching for seed drop. When most are mature, cut the seed heads on a dry day and place them in a paper bag or over a tray. Keep the bag away from rain and allow the heads to finish drying.
- Clean and store the seed. Rub the dry heads gently to release the seeds and remove as much chaff as practical. Label the seed with the plant and harvest date, then store it completely dry in a sealed container in a cool, dark place. Parsley seed does not always remain reliably viable for long, so sow fresh seed when possible. Do not eat seed or plant parts unless you have positively identified the plant and know they are suitable for your intended use.
- Finish the plant’s cycle. Once parsley has flowered and set seed, it commonly declines and dies; it is not a permanent perennial. You can leave a few ripe seeds to fall naturally, or collect them and sow separately. Start replacement plants before the old one is exhausted if you want an uninterrupted supply of leaves.
Common Mistakes
- Expecting first-year flowering as the norm: Parsley usually flowers in its second year. A young plant may bolt early under stress, but this is not the usual life cycle.
- Harvesting heavily while waiting for seed: Frequent cutting removes growth the plant needs for flower and seed production. Reduce harvesting once stalks begin to rise.
- Cutting off every flower stem: This prevents seed formation and removes a useful food source for pollinators. Remove stems only if you want to delay flowering or preserve leaf production.
- Letting the soil become waterlogged: Parsley needs moisture, not standing water. Check drainage, especially in containers.
- Collecting green seed too early: Immature seed may not germinate well. Wait until the seed heads turn brown or tan, and dry them before storage.
- Assuming a flowering plant will keep producing tender leaves: Leaf quality often declines after flowering begins. Grow a new plant for continued kitchen harvests.
Tips
- Grow several plants if you want both leaves and seed: keep some trimmed for harvest and let one or two flower.
- Mark the plant you plan to save seed from, particularly if you grow multiple varieties.
- Check flower heads frequently as they dry. Seeds can drop once mature, so harvest before the clusters become completely brittle.
- Use a paper bag rather than a plastic bag for drying seed heads; paper allows moisture to escape and helps reduce mold risk.
- If you want to encourage natural reseeding, leave a few ripe heads in place and keep the surrounding soil lightly moist. Seedlings may appear when conditions suit them, but germination is not guaranteed.
Troubleshooting
No flowers appear: If the plant is in its first year, this is usually normal. Keep it healthy through the season and, where winters are cold, protect the root area with mulch while avoiding waterlogged soil. In mild climates, parsley may not receive the seasonal cues that trigger flowering, so timing can vary.
The plant bolts during hot weather: Heat, dry soil, or other stress can prompt early flowering. Water consistently and provide afternoon shade, but once flower stalks are well established, removing them may not restore the plant to sustained, high-quality leaf production. Sow or transplant another parsley plant for leaves.
Flower stalks are weak or falling over: Check that the plant gets adequate light and is not overfed or overcrowded. Add a stake and tie stems loosely. Improve drainage if the soil stays wet.
Flowers form but no seeds seem to develop: Give the clusters time; seeds begin green and take longer to mature. Weather and pollinator activity can affect seed set. Leave the flowers undisturbed, avoid spraying them, and try again with another plant if few seeds develop.
Seeds are moldy or fail to sprout: Seeds stored before fully drying may mold, while old seed can lose viability. Discard moldy seed, dry fresh seed thoroughly, and test a small sample by sowing it in moist, warm potting mix. Keep the mix evenly moist, not saturated, and be patient: parsley seed can take several weeks to germinate.
Frequently Asked Questions
Should I let my parsley plant flower?
Yes, if you want to support pollinators or save seed. If you want the plant to keep producing tender leaves, cut flower stalks early and grow a replacement plant for later harvests.
Does parsley flower in its first year?
Usually not. Parsley is generally biennial and flowers in its second year, though heat, drought, or other stress can cause early bolting.
Can I eat parsley after it flowers?
The leaves are generally still usable, but they may be tougher or less flavorful. Harvest only healthy leaves, and use another plant if you want consistently tender foliage.
How long does it take for parsley seeds to ripen?
It varies with weather and growing conditions. Wait until the seed clusters turn brown or tan rather than relying on a set number of days.
Will parsley reseed itself?
It may. Some mature seeds can fall and germinate when conditions are favorable, but collecting and sowing fresh seed gives you more control over where plants grow.
Will parsley survive after flowering?
It often declines after flowering and seed production because it has completed its usual two-year life cycle. Plan to raise new plants for a continuing harvest.