When to Plant Scallions in Delaware (2026 Guide)
If you're planning to grow scallions in Delaware, you'll be delighted to know they are one of the most productive crops you can plant. Their versatility makes them a favorite among gardeners, and they can thrive in a variety of conditions. With Delaware's relatively mild climate, especially in Zone 6b, you can often start planting scallions after the last frost date, which on average is April 10.
Scallions, or green onions, are typically ready for harvest around 60–70 days after sowing, allowing for multiple growing cycles throughout the season. This means that with proper timing, you can enjoy fresh scallions from early summer through late fall. If you are in Zone 6a, take note that your last spring frost is around April 18, so planting times will adjust accordingly.
To get the most from your scallion garden, it’s advisable to sow seeds every three to four weeks. By taking this staggered approach, you ensure a continuous supply of this flavorful crop as they mature. Delaware's approximately 203-day frost-free season in Zone 6b or 189 days in Zone 6a gives you ample opportunity to enjoy scallions well into the fall, with the first fall frost arriving around October 30 in the warmer zone.
Planting Schedule by USDA Zone in Delaware
| Zone | Indoor start | Transplant out | Direct sow | Harvest |
|---|---|---|---|---|
| Zone 6b | Start February 15 – March 1, ~6–8 weeks before April 10 | Transplant outdoors April 15 – April 30, after last frost | Direct sow April 15 – June 15 for continuous harvests | Harvest from June 1 – October 30, or until first frost |
| Zone 6a | Start February 15 – March 1, ~6–8 weeks before April 18 | Transplant outdoors May 1 – May 10, after last frost | Direct sow April 25 – June 15 for continuous harvests | Harvest from June 10 – October 24, or until first frost |
Scallions Planting Windows in Delaware
- Indoor start: Start your scallion seeds indoors between February 15 and March 1 for optimal growth.
- Transplant outdoors: Transplant your scallions outdoors in Zone 6b around April 15–30, once the danger of frost has passed.
- Harvest: You can begin harvesting scallions by June 1 in Zone 6b and continue until the first fall frost around October 30.
Common Mistakes Growing Scallions in Delaware
- One common mistake in Delaware is planting scallions too close to the last frost without protection. Even though they tolerate light frost, cold nights can stunt their growth significantly.
- Many gardeners in Delaware assume scallions can be planted in full sun all day. However, during peak summer, they may require partial shade to prevent them from bolting and losing flavor.
- A frequent error when growing scallions in Delaware is failing to properly prepare the soil. Due to its clay content, amending the soil is important to ensure drainage and prevent root rot.
- Delaware's wet springs can lead to overwatering. Scallions grow best in moist, well-drained soil and are susceptible to diseases if waterlogged.
- Assuming all scallions have the same density needs is misleading. Some believe they can be spaced widely, but compact planting allows for better yields and maximizes garden space efficiently.
Frequently Asked Questions
What if I'm in a cold pocket of Delaware?
If you live in a colder neighborhood such as a low-lying area in Newark, be mindful of late frost risks. Consider using row covers to protect your scallion seedlings until they are well established.
Can I still plant scallions in May?
Yes, you can absolutely plant scallions in May, especially if you're in Zone 6b. Just ensure that they are established before any summer heat arrives, as prolonged high temperatures can affect their growth.
How do I know when to harvest my scallions?
Harvest scallions when they reach about 6–8 inches tall. The ideal time for harvest is from early June until late October, as the days grow cooler, which maintains their flavor better.
Can I grow scallions in containers?
Yes, scallions are excellent candidates for container gardening. Use a pot at least 6 inches deep, and ensure it has good drainage to support healthy growth.
Do scallions need full sunlight?
While scallions prefer full sun, they are adaptable to partial shade, particularly during the hottest parts of the day. This can help prevent bolting and maintain leaf quality.
Keep Learning
City guides in Delaware
Other crops in Delaware
Typical fall sowing window for Scallions in Delaware: August 11 – September 1.