When to Plant Dill in Washington (2026 Guide)
Growing dill in Washington can be a rewarding endeavor for both seasoned gardeners and novices. This aromatic herb thrives in cooler weather, making it an excellent addition to spring and fall gardens. In many parts of the state, the last spring frost occurs around April 9 for Zone 6b, allowing for a great growing season ahead.
Dill (Anethum graveolens) is beloved for its feathery leaves and distinct seeds, making it a staple in pickling and various culinary dishes. Its growth from spring to fall is optimum, with an ideal frost-free period extending up to approximately 200 days in some regions. Understanding when to plant this herb is crucial for ensuring robust growth and a plentiful harvest.
For Washington gardeners, it's essential to know your local frost dates, whether you are in Spokane or Seattle. With its varying zones, such as the early April frost for Zone 6b and a later May 6 frost for Zone 5b, timing your sowing is vital to avoid the heat of summer that can prompt dill to bolt prematurely.
Planting Schedule by USDA Zone in Washington
| Zone | Indoor start | Transplant out | Direct sow | Harvest |
|---|---|---|---|---|
| Zone 6b | Not recommended — direct sow only | Not recommended — direct sow only | Start March 1 – April 9, ~4–6 weeks before April 10 | Start June 15 – July 15, ~60–90 days after planting |
| Zone 6a | Not recommended — direct sow only | Not recommended — direct sow only | Start March 15 – April 20, ~4–6 weeks before April 20 | Start June 15 – July 15, ~60–90 days after planting |
| Zone 5b | Not recommended — direct sow only | Not recommended — direct sow only | Start April 1 – May 6, ~4–6 weeks before May 6 | Start July 15 – August 15, ~60–90 days after planting |
Dill Planting Windows in Washington
- Indoor start: Indoor start is not recommended, as dill prefers to be directly sown outside for optimal growth and prevention of bolting.
- Transplant outdoors: Outdoor transplanting for dill is not recommended; it should be sown directly in the garden from early March to early May depending on the region.
- Harvest: Harvesting dill typically occurs from mid-June to mid-August, ensuring the plants have matured and flavorful leaves and seeds.
Common Mistakes Growing Dill in Washington
- One common mistake Washington gardeners make is sowing dill too late in the season, especially in cooler areas. Since dill is sensitive to heat, planting should adhere closely to frost dates to ensure a vibrant crop.
- Many novice gardeners in Washington fail to recognize the importance of direct sowing for dill. Transplanting can lead to stressed plants that bolt early, reducing the yield significantly for home cooks who cherish fresh dill.
- Ignoring the varying hardiness zones across Washington can lead to misunderstandings about when to plant. For instance, those in cooler regions must follow the later frost dates or risk disappointing results.
- Water management is another pitfall, particularly when Washington experiences periods of heavy rain followed by dry spells. Maintaining consistent moisture is crucial for young dill plants, or growth may suffer.
- Spacing dill plants too closely is a frequent oversight, particularly among beginner gardeners in urban Washington. Proper spacing allows good air circulation, preventing disease and encouraging healthier plants.
Frequently Asked Questions
What if I'm in a cold pocket of Washington?
If you live in a colder area, be mindful of your specific frost dates and adjust your planting schedule accordingly. Opt for early varieties of dill, and consider using season extenders.
Can I still plant dill in May?
Planting dill in May is not ideal, especially in warmer zones as the temperatures may trigger bolting. Aim to plant earlier or choose a variety suited for summer growth.
How often should I water dill?
Dill prefers consistent moisture, so aim to water regularly, especially during dry spells. However, avoid waterlogging, as it can lead to root rot.
What's the best way to harvest dill?
For the best flavor, harvest dill in the morning after the dew has dried. Cut the top fronds while leaving a majority of the plant for continued growth.
Are there any pests that affect dill?
Dill can attract pests like aphids and caterpillars. Employ natural pest control strategies, such as introducing beneficial insects or using organic insecticidal soaps as needed.
Keep Learning
City guides in Washington
Other crops in Washington
Typical fall sowing window for Dill in Washington: August 3 – August 24.