When to Plant Cilantro in Oregon (2026 Guide)
Oregon's diverse climate creates unique opportunities and challenges for growing herbs, especially cilantro. In areas such as Beaverton and Coos Bay, you can expect a last spring frost date around April 11, while those in Albany and Corvallis might face the frost a bit later, on April 22. Each zone offers a distinct length of the growing season, impacting when it's best to sow your seeds.
Cilantro, an aromatic herb used in various dishes from Mexican salsas to Indian curries, thrives in cooler temperatures. Since it bolts quickly when exposed to prolonged heat, careful planning is essential for a successful harvest. For instance, in Zone 7a, which includes cities like Gresham, you can enjoy a frost-free growing season of about 237 days, offering plenty of time for multiple plantings.
To ensure you have a continuous supply of fresh cilantro, practice succession planting by sowing seeds every 2-3 weeks. This method is particularly effective in maximizing your harvest throughout the cooler months when temperatures are ideal for cilantro's growth. Always remember that directly seeding cilantro leads to the best results, as this herb resents transplanting.
Planting Schedule by USDA Zone in Oregon
| Zone | Indoor start | Transplant out | Direct sow | Harvest |
|---|---|---|---|---|
| Zone 6b | Not recommended — direct sow only. | Not recommended — direct sow only. | Start March 15 – April 10, ~4–6 weeks before April 11. | Late May – Mid-June, ~6 weeks after sowing. |
| Zone 6a | Not recommended — direct sow only. | Not recommended — direct sow only. | Start April 1 – April 22, ~4–6 weeks before April 22. | Mid-June – Early July, ~6 weeks after sowing. |
| Zone 7a | Not recommended — direct sow only. | Not recommended — direct sow only. | Start March 1 – March 23, ~3–5 weeks before March 23. | Late April – Late May, ~6 weeks after sowing. |
Cilantro Planting Windows in Oregon
- Indoor start: Cilantro does not thrive when started indoors; plan to sow directly outdoors instead.
- Transplant outdoors: Transplanting is not recommended for cilantro; direct sowing must be done.
- Harvest: Expect to harvest cilantro approximately 6 weeks after direct sowing, typically from late April to early July, depending on the zone.
Common Mistakes Growing Cilantro in Oregon
- Many gardeners in Oregon overlook the importance of direct sowing cilantro seeds instead of transplanting. This herb has a taproot that doesn’t respond well to disturbance. Focus on planting seeds directly into prepared soil for optimal growth.
- In coastal areas, the high humidity can lead to unexpected fungal diseases in cilantro plants. Be mindful of airflow and moisture levels, and consider using raised beds to combat excessive dampness and promote healthy, vigorous plants.
- Oregon's varying weather patterns can catch gardeners off guard, especially in spring. Late spring snow or cold snaps can threaten tender young seedlings. Always keep an eye on the forecast during critical planting times to protect your cilantro.
- Some growers mistakenly believe they can keep cilantro in the garden all summer long. In Oregon's warmer areas, cilantro will bolt quickly when temperatures rise. Plan for continual sowing throughout the cooler months for the best results.
- Cilantro is often overlooked when planning garden companions in Oregon. Some believe planting cilantro near dill can enhance flavor, but this can lead to cross-pollination, producing seeds with muddled flavors. Keep these plants separated for better outcomes.
Frequently Asked Questions
What if my garden is in a colder pocket of Oregon?
If you're in a particularly cool area, consider starting your cilantro seeds slightly earlier in the season. Monitor local frost dates closely and plant in well-draining soil to encourage good growth despite the cooler temperatures.
Can I still plant cilantro in May?
Planting cilantro in May could be tricky, as it may be too warm for the herb to thrive. Ideally, aim to sow before temperatures rise significantly. If you must plant in May, select slow-bolting varieties.
How do I ensure continuous cilantro harvest?
To maintain a steady supply of cilantro, practice succession planting by sowing seeds every 2–3 weeks. This strategy allows younger plants to take over as older ones bolt, ensuring you always have fresh leaves on hand.
What’s the best way to store harvested cilantro?
For maximum freshness, store cilantro in the fridge wrapped in a damp paper towel inside a sealed bag. This method maintains moisture and prevents wilting, allowing you to use your harvested cilantro for longer.
Should I let my cilantro go to seed?
If your cilantro bolts, don’t pull it out; let it flower and set seed. Bolting cilantro attracts beneficial insects and the mature seeds can create new plants the following season, making it a natural method for maintaining your garden's health.
Keep Learning
City guides in Oregon
Other crops in Oregon
Typical fall sowing window for Cilantro in Oregon: August 12 – September 2.